555: Satellite Constellations and the Future of Astronomy Astronomy Cast 555: Satellite Constellations and the Future of Astronomy by Fraser Cain & Dr. Pamela Gay The other big issue at the AAS was the challenge that astronomy is going to face from all the new satellite constellations coming shortly. There are already 180 Starlinks in orbit, and thousands more are coming, not to mention the other constellations in the works. What will be the impact on astronomy, and what can we do about it?

554: Big Telescope Controversy in Hawai'i Astronomy Cast 554: Big Telescope Controversy in Hawai'i by Fraser Cain & Dr. Pamela Gay This week we're live at the American Astronomical Society's 235th meeting in Honolulu, Hawai'i. We learned about new planets, black holes and star formation, but the big issue hanging over the whole conference is the protests and politics over the new Thirty Meter Telescope due for construction on Mauna Kea.

553: What To Look Forward To In 2020 Astronomy Cast 553: What To Look Forward To In 2020 by Fraser Cain & Dr. Pamela Gay It's hard to believe it, but we survived another trip around the Sun. Now it's time to take the whole journey all over again, but with new news. Let's take a look at some of the space and astronomy stories we're looking forward to in 2020.

552: Boyajian's star (and other strange stars) Astronomy Cast 552: Boyajian's star (and other strange stars) by Fraser Cain & Dr. Pamela Gay Huge surveys of the sky are finding more and more planets, stars and galaxies. But they're also turning up strange objects astronomers have never seen before, like Boyajian's star. Today we're going to talk about some unusual objects astronomers have discovered, and why this number is only going to go way way up.

Hi everyone, Producer Susie here. This weekend, December 21-23, 2019, we will be having our CosmoQuest Hangoutathon. For 40 straight hours, our team will be bringing you guests, science and fun live on our channel. We are raising money to pay for our team to continue to bring you science, and for us to continue our citizen science programs, like the extremely successful Bennu Mappers from this past year, where over 3500 of you wonderful volunteers mapped over 14 million rocks on the asteroid Bennu, looking for a safe place for the OSIRIS-REx mission to grab samples to return to earth. We want to keep doing projects like this - and we need your help to continue doing the science. Please join us at starting 9am EST / 6am PST / 1400UTC. If you can’t tune in live, you can catch the replays on Twitch, and we’ll be trying our best to archive all of the content on YouTube after this weekend. We’re accepting donations at As part of the Planetary Science Institute, we are a 501c3 non-profit, so all of your donations are tax deductible where the law allows. Please watch, share and donate if you can, so we can keep bringing the science to you! Thank you for listening!

551: Missing Epochs - Observing before the CMBR Astronomy Cast 551: Missing Epochs - Observing before the CMBR by Fraser Cain & Dr. Pamela Gay The Cosmic Microwave Background Radiation is the earliest moment in the Universe that we can see with our telescopes, just a few hundred thousand years after the Big Bang itself. What will it take for us to be able to fill in the missing gap? To see closer to the beginning of time itself?

550: Missing Epochs - Observing the Cosmic Dark Ages Astronomy Cast 550: Missing Epochs - Observing the Cosmic Dark Ages by Fraser Cain & Dr. Pamela Gay Powerful observatories like Hubble and the Very Large Telescope have pushed our vision billions of light-years into the Universe, allowing us to see further and further back in time. But there are regions which we still haven't seen: the Cosmic Dark Ages. What's it going to take to observe some of these earliest moments in the Universe?

549: Stellar nucleosynthesis revisited: In and on and around dead stars Astronomy Cast 549: Stellar nucleosynthesis revisited: In and on and around dead stars by Fraser Cain & Dr. Pamela Gay Last week we gave you an update on the formation of elements from the Big Bang and in main sequence stars like the Sun. This week, we wrap up with a bang, talking about the death of the most massive stars and how they seed the Universe with heavier elements.

548: Stellar nucleosynthesis revisited: In stellar cores & atmospheres Astronomy Cast 548: Stellar nucleosynthesis revisited: In stellar cores & atmospheres by Fraser Cain & Dr. Pamela Gay The Universe started out with hydrogen and helium and a few other elements, but all around us, there are other, more proton-rich elements. We believe these heavier elements formed in stars, but which stars? And at what points in their lives? Today we'll update our knowledge with the latest science.

547: Why Astronomy Still Needs Humans Astronomy Cast 547: Why Astronomy Still Needs Humans by Fraser Cain & Dr. Pamela Gay Few sciences have been able to take advantage of the power of computers like astronomy. But with all this computing power, you might be surprised to learn how important a role humans still play in this science.

546: Weird Issues: Planetary Migration Astronomy Cast 546: Weird Issues: Planetary Migration by Fraser Cain & Dr. Pamela Gay Before we discovered other planets, our Solar System seemed like a perfectly reasonable template for everywhere. But now we see massive planets close to their stars, which leads you to the question, how does it all get there. Do the planets form in place or do they migrate around?

545: Weird Issues: Are comets asteroids or are asteroids comets? Astronomy Cast 545: Weird Issues: Are comets asteroids or are asteroids comets? by Fraser Cain & Dr. Pamela Gay Things used to be so simple. Comets were snowballs from the outer Solar System, and asteroids were rocks from the inner Solar System. But now everything's all shades of grey. Astronomers have found asteroids that behave like comets and comets that behave like asteroids.

544: Weird Issues: Biosignatures Astronomy Cast 544: Weird Issues: Biosignatures by Fraser Cain & Dr. Pamela Gay Once again, another place where the Universe is going to make this difficult for us. Proving, once and for all that there's alien life on another world. It should be straightforward, look for biosignatures, but it looks like there are natural sources that could explain almost any chemical we could hope to search for.

Got clear skies? Go out tonight and catch the Orionids Meteor shower, a storm of falling stars generated by Halley's comet. Later this week, we'll see aurora like those that will one day be predicted by the ESA Solar Probe. We also have an update on the Mars 2020 rover.

543: Weird Issues: The Habitable Zone Astronomy Cast 543: Weird Issues: The Habitable Zone by Fraser Cain & Dr. Pamela Gay Our series on Universe weirdness marches on. This week we take a look at the habitable zone, and how things aren’t as simple as we thought.

542: Weird Issues: The Age of the Universe Astronomy Cast 542: Weird Issues: The Age of the Universe by Fraser Cain & Dr. Pamela Gay Our series on Universe weirdness continues, this time we learn how astronomers are struggling to make sense of the age of the Universe.

541: Weird Issues: Expansion Rate of the Universe Astronomy Cast 541: Weird Issues: Expansion Rate of the Universe by Fraser Cain & Dr. Pamela Gay Just when the Universe was starting to make sense, the cosmos throws a curveball at us. Astronomers have been trying to accurately measure the expansion rate of the Universe as far back as Hubble. It's been tough to nail down, and now astronomers are starting to figure out why.

540: Weird Issues: How Do (or Don't) Planets Form? Astronomy Cast 540: Weird Issues: How Do (or Don't) Planets Form? by Fraser Cain & Dr. Pamela Gay As astronomers started to discover planets orbiting other stars, they immediately realized that their expectations would need to be tossed out. Hot jupiters? Pulsars with planets? We're now decades into this task, and the Universe is continuing to surprise us.

539: Weird Issues: Why We Don't Know the Age of Saturn's Rings Astronomy Cast 539: Weird Issues: Why We Don't Know the Age of Saturn's Rings by Fraser Cain & Dr. Pamela Gay How old are Saturn's rings? They could be brand new, or they could be as ancient as the Solar System itself. Planetary scientists thought they knew the answer thanks to new data from Cassini, but new ideas are calling even that into question.

538: Asteroids: Rubble piles of the Solar System Astronomy Cast 538: Asteroids: Rubble piles of the Solar System by Fraser Cain & Dr. Pamela Gay Thanks to all the work from Hayabusa 2 and OSIRIS-REx, astronomers are getting a much better look at the smaller asteroids in the Solar System. It turns out, they're piles of rubble... but fascinating piles of rubble. Let's talk about what we've learned so far.

537: Reusable Rocket Revolution Astronomy Cast 537: Reusable Rocket Revolution by Fraser Cain & Dr. Pamela Gay We took a hiatus this summer, but SpaceX sure didn’t, with the tests of the Starhopper prototype. Today we’re going to talk about the revolution in reusable rocketry and quest to build a fully reusable two-stage rocket.

Please help us keep bringing you content by going to and filling out the survey, so Libsyn can find us sponsors for Astronomy Cast!

Astronomy Cast will be on hiatus for July and August. Don't worry, we'll be back in September, and we might just have surprises for you all along this summer! Don't forget you can still catch Pamela with Daily Space, rocket launches and specials on , and you can find all the space news and videos from Fraser at ! We usually record Astronomy Cast every Friday at 3:00 pm EDT / 12:00 pm PDT / 19:00 UTC. You can watch us live on here on , or the .

536: Everyday Relativity Astronomy Cast 536: Everyday Relativity by Fraser Cain & Dr. Pamela Gay Relativity is used in more day to day situations than you may realize. In this episode, we will count (some of) the ways. This episode is brought to you live from the All-Stars Star Party in Indian Wells, California.

535: Astronomy-Related Things To Do This Summer Astronomy Cast 535: Astronomy-Related Things To Do This Summer by Fraser Cain & Dr. Pamela Gay It's summertime, and time for our annual Astronomy Cast hiatus. But that doesn't mean that the astronomy adventure has to end. Today we'll give you some tips and tricks for astronomy summer adventures.

534: Modern South African Astronomy Astronomy Cast 534: Modern South African Astronomy by Fraser Cain & Dr. Pamela Gay You know the drill now. Last week we talked about ancient south African astronomy, and so this week we'll talk about the modern state of astronomy in the southern part of Africa, which happens to be a great place with nice dark skies and a perfect view into the heart of the galaxy.

533: Indigenous South African Astronomy Astronomy Cast 533: Indigenous South African Astronomy by Fraser Cain & Dr. Pamela Gay Let's move to another continent this week, and look at the astronomy that was going on in southern Africa in ancient times.

532: Modern Astronomy of Australia Astronomy Cast 532: Modern Astronomy of Australia by Fraser Cain & Dr. Pamela Gay Last week we talked about how well the indigenous Australians followed the night sky. Well, it turns out, Australia is still an amazing place for astronomy. There are so many powerful observatories in Australia, and even more in the works.

531: Australian Indigenous Astronomy Astronomy Cast 531: Australian Indigenous Astronomy by Fraser Cain & Dr. Pamela Gay South America, especially the Atacama Desert in Chile has become one of the best places in the world to put a telescope. It's dry, high, and the nights are clear. Today we'll talk about the monster telescopes already in operation in this region, and the big ones coming soon.

530: Astronomy of the Andes - Then and Now Pt. 2 Astronomy Cast 530: Astronomy of the Andes - Then and Now Pt. 2 by Fraser Cain & Dr. Pamela Gay South America, especially the Atacama Desert in Chile has become one of the best places in the world to put a telescope. It's dry, high, and the nights are clear. Today we'll talk about the monster telescopes already in operation in this region, and the big ones coming soon.

529: Astronomy of the Andes - Then and Now Pt. 1 Astronomy Cast 529: Astronomy of the Andes - Then and Now Pt. 1 by Fraser Cain & Dr. Pamela Gay The Andes mountains in South America are a hotspot of astronomy today, but ancient peoples knew it was a great place for astronomy and lived their lives in tune with the night sky. Today we'll learn all about what they knew, and how they mapped the movements of the stars and planets.

528: Modern Astronomy of the American Southwest Astronomy Cast 528: Modern Astronomy of the American Southwest by Fraser Cain & Dr. Pamela Gay Last week we talked about the ancient astronomy of the American Southwest. But this is actually Pamela's stomping grounds, and she's spent many a night perched atop mountains in this region staring in the night sky with gigantic telescopes. How does astronomy get done in this region today?

527: Ancient Astronomy of the American Southwest Astronomy Cast 527: Ancient Astronomy of the American Southwest by Fraser Cain & Dr. Pamela Gay Ancient peoples had no light pollution, and they knew the night skies very well. In fact, they depends on them to know when to plant and when to harvest. Today Pamela talks about the archeoastronomical sites of the American Southwest.

526: Event Horizon Telescope and the Black Hole at M87 Astronomy Cast 526: Event Horizon Telescope and the Black Hole at M87 by Fraser Cain & Dr. Pamela Gay Today, of course, we're going to talk about the announcement from the Event Horizon Telescope and the first photograph of a black hole's event horizon.

525: 100 Years of the International Astronomical Union Astronomy Cast 525: 100 Years of the International Astronomical Union by Fraser Cain & Dr. Pamela Gay Even though they might be scattered around our planet, astronomers have way to come together to work out issues that face their entire field of study. It's called the International Astronomical Union, and they're the ones who work out the new names for stars, and sometimes de-planet beloved Kuiper Belt Objects.

524: Judging Age & Origins, part 3 - Beyond Our System Astronomy Cast 524: Judging Age & Origins, part 3 - Beyond Our System by Fraser Cain & Dr. Pamela Gay We learned how to figure out the ages of objects in the Solar System, now we push out into the deeper Universe. What about stars, galaxies, and even the Universe itself? How old is it? This episode is part 3 of a series.

523: Judging Age & Origins, Pt. 2 Across the Solar System Astronomy Cast 523: Judging Age & Origins, Pt. 2 Across the Solar System by Fraser Cain & Dr. Pamela Gay Today we push our aging curiosity out into the Solar System to ask that simple question: how old is it and how do we know? What techniques do astronomers use to age various objects and regions in the Solar System? This is part two of a series.

522: Judging Age & Origins, part 1 - Earth Rocks Astronomy Cast 522: Judging Age & Origins, part 1 - Earth Rocks by Fraser Cain & Dr. Pamela Gay People always want to know how old everything is. And more specifically, they want to know how we know how old everything is. Well, here at Astronomy Cast, it's our job to tell you now only what we know, but how we know what we know. And today we'll begin a series on how we know how old everything is.

Bonus: Dust with Dr. Paul Sutter Astronomy Cast Bonus: Dust with Dr. Paul Sutter by Fraser Cain & Dr. Pamela Gay Recorded during the Astrotour to Costa Rica, Fraser talks to Dr. Paul Matt Sutter about the nature of dust and BICEP 2's claim of discovering primordial gravitational waves.

521: The Deep Space Network Astronomy Cast 521: The Deep Space Network by Fraser Cain & Dr. Pamela Gay We always focus on the missions, but there's an important glue that holds the whole system together. The Deep Space Network. Today we're going to talk about how this system works and how it communicates with all the spacecraft out there in the Solar System.

520: Transients: What They Are and Why They Matter, Part 2 Astronomy Cast 520: Transients: What They Are and Why They Matter, Part 2 by Fraser Cain & Dr. Pamela Gay

519: Transients: What They Are and Why They Matter Astronomy Cast 519: Transients: What They Are and Why They Matter by Fraser Cain & Dr. Pamela Gay

518: When the Universe tried to Declare War Astronomy Cast 518: When the Universe tried to Declare War by Fraser Cain & Dr. Pamela Gay

517: Fritz Zwicky and the Zwicky Transient Facility Astronomy Cast 517: Fritz Zwicky and the Zwicky Transient Facility by Fraser Cain & Dr. Pamela Gay

516: Polar Vortices Astronomy Cast 516: Polar Vortices by Fraser Cain & Dr. Pamela Gay

515: Space Radiation Astronomy Cast 515: Space Radiation by Fraser Cain & Dr. Pamela Gay

514: Planetary Protection Protocols Astronomy Cast 514: Planetary Protection Protocols by Fraser Cain & Dr. Pamela Gay

513: Stellar Fusion Astronomy Cast 513: Stellar Fusion by Fraser Cain & Dr. Pamela Gay

512: Direct Imaging of Exoplanets Astronomy Cast 512: Direct Imaging of Exoplanets by Fraser Cain & Dr. Pamela Gay

511: Predictions for 2019 Astronomy Cast 511: Predictions for 2019 by Fraser Cain & Dr. Pamela Gay

510: 2018 - Year in Review Astronomy Cast 510: 2018 - Year in Review by Fraser Cain & Dr. Pamela Gay

509: Fiction to Fact: 3D Printers Astronomy Cast 509: Fiction to Fact: 3D Printers by Fraser Cain & Dr. Pamela Gay

508: 2018 Holiday Gift Guide Astronomy Cast 508: 2018 Holiday Gift Guide by Fraser Cain & Dr. Pamela Gay

507: From Fiction to Fact: Ion Drive Astronomy Cast 507: > From Fiction to Fact: Ion Drive by Fraser Cain & Dr. Pamela Gay

506: It’s not Aliens, Unless it’s Aliens Astronomy Cast 506: It’s not Aliens, Unless it’s Aliens by Fraser Cain & Dr. Pamela Gay

505: Seismology Astronomy Cast 505: Seismology by Fraser Cain & Dr. Pamela Gay

504: Radar, Lidar & Sonar Astronomy Cast 504: Radar, Lidar & Sonar by Fraser Cain & Dr. Pamela Gay

503: Gravity Mapping Astronomy Cast 503: Gravity Mapping by Fraser Cain & Dr. Pamela Gay

502: No Touching: Determining Composition of Worlds Remotely Astronomy Cast 502: No Touching: Determining Composition of Worlds Remotely by Fraser Cain & Dr. Pamela Gay

501: Water Worlds Revisited Astronomy Cast 501: Water Worlds Revisited by Fraser Cain & Dr. Pamela Gay

500: Live Celebration! Astronomy Cast 500: Live Celebration! by Fraser Cain & Dr. Pamela Gay

499: What is the proposed Hubble-Lemaitre Law? Astronomy Cast 499: What is the proposed Hubble-Lemaitre Law? by Fraser Cain & Dr. Pamela Gay

Astronomy Cast will be on hiatus until September, 2018. When we return, we'll be gearing up for the 500th Episode!

498: Dwarf Galaxy Update Astronomy Cast 498: Dwarf Galaxy Update by Fraser Cain & Dr. Pamela Gay

497: Update on Globular Clusters Astronomy Cast 497: Update on Globular Clusters by Fraser Cain & Dr. Pamela Gay

496: Update on Stellar Populations (I, II, & III) Astronomy Cast 496: Update on Stellar Populations (I, II, & III) by Fraser Cain & Dr. Pamela Gay

495: Update on Asteroids & Prospects of Asteroid Mining Astronomy Cast 495: Update on Asteroids & Prospects of Asteroid Mining by Fraser Cain & Dr. Pamela Gay

494: Icy Moons Update 2018 Astronomy Cast 494: Icy Moons Update 2018 by Fraser Cain & Dr. Pamela Gay

493: Mars Update 2018 Astronomy Cast 493: Mars Update 2018 by Fraser Cain & Dr. Pamela Gay

492: Comets, Asteroids and KBO’s Astronomy Cast 492: Comets, Asteroids and KBO’s by Fraser Cain & Dr. Pamela Gay

491: Exoplanet Update 2018 Astronomy Cast 491: Exoplanet Update 2018 by Fraser Cain & Dr. Pamela Gay

490: What’s New with Supernovae Astronomy Cast 490: What’s New with Supernovae by Fraser Cain & Dr. Pamela Gay

489: Black Hole Update Astronomy Cast 489: Black Hole Update by Fraser Cain & Dr. Pamela Gay

488: Dark Energy: 2018 Edition Astronomy Cast 488: Dark Energy: 2018 Edition by Fraser Cain & Dr. Pamela Gay

487: Dark Matter: 2018 Edition Astronomy Cast 487: Dark Matter: 2018 Edition by Fraser Cain & Dr. Pamela Gay

486: Particle Physics Update Astronomy Cast 486: Particle Physics Update by Fraser Cain & Dr. Pamela Gay

485: Docking, Refueling, and Transferring Astronomy Cast 485: Docking, Refueling, and Transferring by Fraser Cain & Dr. Pamela Gay

484: Transfer Orbits and Gravitational Assists Astronomy Cast 484: Transfer Orbits and Gravitational Assists by Fraser Cain & Dr. Pamela Gay

483: Stopping in Space Astronomy Cast 483: Stopping in Space by Fraser Cain & Dr. Pamela Gay

482: Alternative Ways to Space Astronomy Cast 482: Alternative Ways to Space by Fraser Cain & Dr. Pamela Gay

481: Rockets pt. 3 – Going Faster, Higher, Farther after Fairing Separation Astronomy Cast 481: Rockets pt. 3 – Going Faster, Higher, Farther after Fairing Separation by Fraser Cain & Dr. Pamela Gay

This was a special Q&A episode Pamela recorded while Fraser was in Iceland.

480: Rockets pt. 2- Multi-stage Boosters Astronomy Cast 480: Rockets pt. 2- Multi-stage Boosters by Fraser Cain & Dr. Pamela Gay

479: Rockets pt. 1- What Does “Single Stage To Orbit” Really Mean? Astronomy Cast 479: Rockets pt. 1- What Does “Single Stage To Orbit” Really Mean? by Fraser Cain & Dr. Pamela Gay

478: Apollo 8 with Paul Hildebrandt Astronomy Cast 478: Apollo 8 with Paul Hildebrandt by Fraser Cain & Dr. Pamela Gay

477: State of Exploration: Once and Future Moon Astronomy Cast 477: State of Exploration: Once and Future Moon by Fraser Cain & Dr. Pamela Gay

476: The Overview Effect Astronomy Cast 476: The Overview Effect by Fraser Cain & Dr. Pamela Gay

475: Fast Radio Bursts Astronomy Cast 475: Fast Radio Bursts by Fraser Cain & Dr. Pamela Gay

474: Predictions for 2018 Astronomy Cast 474: Predictions for 2018 by Fraser Cain & Dr. Pamela Gay

473: Remembering the Best Space Science of 2017 Astronomy Cast 473: Remembering the Best Space Science of 2017 by Fraser Cain & Dr. Pamela Gay

472: Best Modern Sci Fi for the Science Lover – Part 4: Bioscience Astronomy Cast 472: Best Modern Sci Fi for the Science Lover – Part 4: Bioscience by Fraser Cain & Dr. Pamela Gay

471: Best Modern Sci Fi for the Science Lover – Part 3: Human Computer Relations Astronomy Cast 471: Best Modern Sci Fi for the Science Lover – Part 3: Human Computer Relations by Fraser Cain & Dr. Pamela Gay

470: Best Modern Sci Fi for the Science Lover – Part 2: 3D Printing Astronomy Cast 470: Best Modern Sci Fi for the Science Lover – Part 2: 3D Printing by Fraser Cain & Dr. Pamela Gay

469: Best Modern Sci Fi for the Science Lover – Part 1 Space Exploration Astronomy Cast 469: Best Modern Sci Fi for the Science Lover – Part 1 Space Exploration by Fraser Cain & Dr. Pamela Gay

468: Simulations for Science and Fun Astronomy Cast 468: Simulations for Science and Fun by Fraser Cain & Dr. Pamela Gay

467: Resonance Astronomy Cast 467: Resonance by Fraser Cain & Dr. Pamela Gay

466: Origins of Zero (0) Astronomy Cast 466: Origins of Zero (0) by Fraser Cain & Dr. Pamela Gay

465: Exploiting Interfering Light Astronomy Cast 465: Exploiting Interfering Light by Fraser Cain & Dr. Pamela Gay

464: Why the Hype over an Exorock? Astronomy Cast 464: Why the Hype over an Exorock? by Fraser Cain & Dr. Pamela Gay

463: Pareidolia and the Moon Astronomy Cast 463: Pareidolia and the Moon by Fraser Cain & Dr. Pamela Gay

462: Modeling the Weather Astronomy Cast 462: Modeling the Weather by Fraser Cain & Dr. Pamela Gay

461: Measuring the Weather with Satellites Astronomy Cast 461: Measuring the Weather with Satellites by Fraser Cain & Dr. Pamela Gay

460: Earth from Afar: Remote Sensing Astronomy Cast 460: Earth from Afar: Remote Sensing by Fraser Cain & Dr. Pamela Gay

459: Arecibo Observatory Astronomy Cast 459: Arecibo Observatory by Fraser Cain & Dr. Pamela Gay

458: The Science of Cassini Astronomy Cast 458: The Science of Cassini by Fraser Cain & Dr. Pamela Gay

457: Why Did Cassini Have To Die? In Memoriam Astronomy Cast 457: Why Did Cassini Have To Die? In Memoriam by Fraser Cain & Dr. Pamela Gay

456: Pluto Revisited Astronomy Cast 456: Pluto Revisited by Fraser Cain & Dr. Pamela Gay

455: Your Practical Guide to Colonizing the Milky Way! Astronomy Cast 455: Your Practical Guide to Colonizing the Milky Way! by Fraser Cain & Dr. Pamela Gay

Pamela and Fraser talk about solar eclipse basics at their Solar Eclipse Escape event in Saint Louis on August 19th. What to do, and (perhaps more importantly) what NOT to do is covered!

454: Things We’re Looking Forward To Astronomy Cast 454: Things We’re Looking Forward To by Fraser Cain & Dr. Pamela Gay

453: Favorite Things We’ve Done These 10 Years Astronomy Cast 453: Favorite Things We’ve Done These 10 Years by Fraser Cain & Dr. Pamela Gay

452: Summer Observing Challenges Astronomy Cast 452: Summer Observing Challenges by Fraser Cain & Dr. Pamela Gay

451: When Can I Buy My Ticket To Space? Astronomy Cast 451: When Can I Buy My Ticket To Space? by Fraser Cain & Dr. Pamela Gay

450: Inflatable Habitats Astronomy Cast 450: Inflatable Habitats by Fraser Cain & Dr. Pamela Gay

449: Robots in Space! Astronomy Cast 449: Robots in Space! by Fraser Cain & Dr. Pamela Gay

448: Prepping for the Eclipse Astronomy Cast 448: Prepping for the Eclipse by Fraser Cain & Dr. Pamela Gay

447: Animals in Space Pt. 3: Dogs, Monkeys and More Astronomy Cast 447: Animals in Space Pt. 3: Dogs, Monkeys and More by Fraser Cain & Dr. Pamela Gay

446: Animals in Space Pt. 2: Mice and Other Small Animals Astronomy Cast 446: Animals in Space Pt. 2: Mice and Other Small Animals by Fraser Cain & Dr. Pamela Gay

445: Animals in Space Pt. 1: Insects and Arachnids Astronomy Cast 445: Animals in Space Pt. 1: Insects and Arachnids by Fraser Cain & Dr. Pamela Gay

444: Fractals Astronomy Cast 444: Fractals by Fraser Cain & Dr. Pamela Gay

443: Destroy and Rebuild Pt. 7: Tsunamis Astronomy Cast 443: Destroy and Rebuild Pt. 7: Tsunamis by Fraser Cain & Dr. Pamela Gay

442: Destroy and Rebuild Pt. 6: Magnetic Pole Reversal Astronomy Cast 442: Destroy and Rebuild Pt. 6: Magnetic Pole Reversal by Fraser Cain & Dr. Pamela Gay

441: Destroy and Rebuild, Pt. 5: Continental Drift Astronomy Cast 441: Destroy and Rebuild, Pt. 5: Continental Drift by Fraser Cain & Dr. Pamela Gay

440: Destroy and Rebuild, Pt. 4: Supervolcanoes! Astronomy Cast 440: Destroy and Rebuild, Pt. 4: Supervolcanoes! by Fraser Cain & Dr. Pamela Gay

439: Destroy and Rebuild, Pt. 3: How Do We Terraform Earth? Astronomy Cast 439: Destroy and Rebuild, Pt. 3: How Do We Terraform Earth? by Fraser Cain & Dr. Pamela Gay

438: Destroy and Rebuild, Pt. 2: Geoengineering Astronomy Cast 438: Destroy and Rebuild, Pt. 2: Geoengineering by Fraser Cain & Dr. Pamela Gay

437: Destroy and Rebuild, Pt. 1: The Torino Scale Astronomy Cast 437: Destroy and Rebuild, Pt. 1: The Torino Scale by Fraser Cain & Dr. Pamela Gay

436 Bonus: Moon Cheeziness Astronomy Cast 436 Bonus: Moon Cheeziness by Fraser Cain & Dr. Pamela Gay

436: Common Misconceptions in Probability Astronomy Cast 436: Common Misconceptions in Probability by Fraser Cain & Dr. Pamela Gay

435: The Butterfly Effect Astronomy Cast 435: The Butterfly Effect by Fraser Cain & Dr. Pamela Gay

434: Am I On An Alien World? Astronomy Cast 434: Am I On An Alien World? by Fraser Cain & Dr. Pamela Gay

433: Volcanoes on Mars Astronomy Cast 433: Volcanoes on Mars by Fraser Cain & Dr. Pamela Gay

432: Geologic Ages of Mars – From Wet and Wild to Desolate Desert Astronomy Cast 432: Geologic Ages of Mars – From Wet and Wild to Desolate Desert by Fraser Cain & Dr. Pamela Gay

431: The Search for Life on Mars Astronomy Cast 431: The Search for Life on Mars by Fraser Cain & Dr. Pamela Gay

430: Coming Home from Mars Astronomy Cast 430: Coming Home from Mars by Fraser Cain & Dr. Pamela Gay

429: Living on Mars Astronomy Cast 429: Living on Mars by Fraser Cain & Dr. Pamela Gay

428: The Moons of Mars Astronomy Cast 428: The Moons of Mars by Fraser Cain & Dr. Pamela Gay

427: Click Bait vs Clear Science Astronomy Cast 427: Click Bait vs Clear Science by Fraser Cain & Dr. Pamela Gay

426: Confirmation Bias Astronomy Cast 426: Confirmation Bias by Fraser Cain & Dr. Pamela Gay

425: Naming Spacecraft Astronomy Cast 425: Naming Spacecraft by Fraser Cain & Dr. Pamela Gay

424: Lightning Astronomy Cast 424: Lightning by Fraser Cain & Dr. Pamela Gay

423: Cyclones Astronomy Cast 423: Cyclones by Fraser Cain & Dr. Pamela Gay

Astronomy Cast 422: Geysers by Fraser Cain & Dr. Pamela Gay

Astronomy Cast 421: Space Games! by Fraser Cain & Dr. Pamela Gay

Astronomy Cast 420: FIRE! by Fraser Cain & Dr. Pamela Gay

AstronomyCast 419: DragonCon 2016 Live: Rocket Girls by Fraser Cain & Dr. Pamela Gay

AstronomyCast 418: I'm a Teapot by Fraser Cain & Dr. Pamela Gay

AstronomyCast 417: Expectation: Failed by Fraser Cain & Dr. Pamela Gay

AstronomyCast 416: Fireballs from Space by Fraser Cain & Dr. Pamela Gay

AstronomyCast 415: The Temperature of the Universe by Fraser Cain & Dr. Pamela Gay

AstronomyCast 414: Navigating Far by Fraser Cain & Dr. Pamela Gay

AstronomyCast 413: Navigating Near by Fraser Cain & Dr. Pamela Gay

AstronomyCast 412: The Color of the Universe by Fraser Cain & Dr. Pamela Gay

AstronomyCast 411: The Science of Sunset Colors by Fraser Cain & Dr. Pamela Gay

AstronomyCast 410: Planet Nine - Facts & Fiction by Fraser Cain & Dr. Pamela Gay

AstronomyCast 409: Spin in the Solar System by Fraser Cain & Dr. Pamela Gay

AstronomyCast 408: Universal Cannibalism by Fraser Cain & Dr. Pamela Gay

AstronomyCast 407: Galactic Cannibalism by Fraser Cain & Dr. Pamela Gay

AstronomyCast 406: Stellar Cannibalism by Fraser Cain & Dr. Pamela Gay

AstronomyCast 405: Method Not Found by Fraser Cain & Dr. Pamela Gay

AstronomyCast 405: Method Not Found by Fraser Cain & Dr. Pamela Gay

AstronomyCast 404: What We Know, What We Don't Know, & What We Can't Know by Fraser Cain & Dr. Pamela Gay

AstronomyCast 403: Funding Big Science by Fraser Cain & Dr. Pamela Gay

AstronomyCast 402: Gravity Eyes - See the Invisible with the Force by Fraser Cain & Dr. Pamela Gay

AstronomyCast 401: Future Predictions by Fraser Cain & Dr. Pamela Gay

AstronomyCast 400: The State of the Universe, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 399: Women in Science by Fraser Cain & Dr. Pamela Gay

AstronomyCast 398: Seeing Things by Fraser Cain & Dr. Pamela Gay

AstronomyCast 397: Why is There Something and Not Nothing? by Fraser Cain & Dr. Pamela Gay

AstronomyCast 396: Family Astronomy for the Holidays by Fraser Cain & Dr. Pamela Gay

AstronomyCast 395: Baryons & Beyond the Standard Model by Fraser Cain & Dr. Pamela Gay

AstronomyCast 394: Bosons by Fraser Cain & Dr. Pamela Gay

AstronomyCast 393: The Standard Model - Leptons & Quarks by Fraser Cain & Dr. Pamela Gay

AstronomyCast 392: The Standard Model by Fraser Cain & Dr. Pamela Gay

AstronomyCast 391: Entropy by Fraser Cain & Dr. Pamela Gay

AstronomyCast 390: Occam's Razor & the Problem with Probabilities by Fraser Cain & Dr. Pamela Gay

AstronomyCast 388: Megastructures by Fraser Cain & Dr. Pamela Gay

AstronomyCast 389: Roundtable with Paul M. Sutter by Fraser Cain & Dr. Pamela Gay

AstronomyCast 387: Water on Mars (Again) by Fraser Cain & Dr. Pamela Gay

AstronomyCast 386: Orbiting Observers by Fraser Cain & Dr. Pamela Gay

AstronomyCast 385: Rovers on the Run by Fraser Cain & Dr. Pamela Gay

AstronomyCast 384: Escaping Probes, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 383: Approaches to Absolute Zero by Fraser Cain & Dr. Pamela Gay

AstronomyCast 382: Degenerate Matter by Fraser Cain & Dr. Pamela Gay

AstronomyCast 381: Hollowing Asteroids by Fraser Cain & Dr. Pamela Gay

AstronomyCast 380: The Limits of Optics by Fraser Cain & Dr. Pamela Gay

AstronomyCast 379: Fermi's Atom Splitting by Fraser Cain & Dr. Pamela Gay

AstronomyCast 378: Rutherford Atoms, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 377: Thomson Finds the Electron by Fraser Cain & Dr. Pamela Gay

AstronomyCast 376: The Miller-Urey Experiment by Fraser Cain & Dr. Pamela Gay

AstronomyCast 375: The Search for Life in the Solar System, with Morgan Rehnberg by Fraser Cain & Morgan Rehnberg

AstronomyCast 374: The Stern-Gerlach Experiment by Fraser Cain & Dr. Pamela Gay

AstronomyCast 373: The Becquerel Experiment by Fraser Cain & Dr. Pamela Gay

AstronomyCast 372: The Millikan Oil Drop Experiment by Fraser Cain & Dr. Pamela Gay

AstronomyCast 371: The Eddington Eclipse Experiment by Fraser Cain & Dr. Pamela Gay

AstronomyCast 370: Kaufmann Bucherer Neumann Experiments by Fraser Cain & Dr. Pamela Gay

AstronomyCast 369: The Fizeau Experiment by Fraser Cain & Dr. Pamela Gay

AstronomyCast 368: Searching for the Ether Wind (The Michelson–Morley Experiment) by Fraser Cain & Dr. Pamela Gay

AstronomyCast 367: Spitzer Does Exoplanets by Fraser Cain & Dr. Pamela Gay

AstronomyCast 366: HARPS by Fraser Cain & Dr. Pamela Gay

AstronomyCast 365: Gaia by Fraser Cain & Dr. Pamela Gay

AstronomyCast 364: COROT by Fraser Cain & Dr. Pamela Gay

AstronomyCast 363: Where Did Earth's Water Come From? by Fraser Cain & Dr. Pamela Gay

AstronomyCast 362: Carolyn Porco by Fraser Cain & Dr. Pamela Gay

AstronomyCast 361: Maria Zuber by Fraser Cain & Dr. Pamela Gay

AstronomyCast 360: Jocelyn Bell Burnell by Fraser Cain & Dr. Pamela Gay

AstronomyCast 359: Margaret Geller by Fraser Cain & Dr. Pamela Gay

AstronomyCast 358: Sandra Faber by Fraser Cain & Dr. Pamela Gay

AstronomyCast 357: Vera Rubin by Fraser Cain & Dr. Pamela Gay

AstronomyCast 356: Inertia by Fraser Cain & Dr. Pamela Gay

AstronomyCast 355: 3D Printing Exploration by Fraser Cain & Dr. Pamela Gay

AstronomyCast: 354: Comet Siding Spring vs. Mars by Fraser Cain & Dr. Pamela Gay

AstronomyCast 353: Seasons and Saturn by Fraser Cain & Dr. Pamela Gay

AstronomyCast 352: Water, Water Everywhere by Fraser Cain & Dr. Pamela Gay

AstronomyCast Live from DragonCon 2014 by Fraser Cain & Dr. Pamela Gay

AstronomyCast 351: Asteroid Adventures by Fraser Cain & Dr. Pamela Gay

AstronomyCast 350: SpaceShip One by Fraser Cain & Dr. Pamela Gay

AstronomyCast 349: Mercury 7 Astronauts by Fraser Cain & Dr. Pamela Gay

AstronomyCast 348: 2 Independence Square, the NASA Headquarters by Fraser Cain & Dr. Pamela Gay

AstronomyCast: Live from Balticon, with P.G. Holyfield by Dr. Pamela Gay

AstronomyCast 346: Area 51 by Fraser Cain & Dr. Pamela Gay

AstronomyCast 345: Launch Complex 39 by Fraser Cain & Dr. Pamela Gay

AstronomyCast 344: Saturn's Rings by Fraser Cain & Dr. Pamela Gay

AstronomyCast 343: The Universe is Trying to Kill You by Fraser Cain & Dr. Pamela Gay

AstronomyCast 342: Sunsetting Spacecraft by Fraser Cain & Dr. Pamela Gay

AstronomyCast 341: The 45th Lunar and Planetary Society Conference, with Alessondra Springmann by Fraser Cain & Dr. Pamela Gay

AstronomyCast 340: Warner von Braum by Fraser Cain & Dr. Pamela Gay

AstronomyCast 339: Space Conspiracy Theories by Fraser Cain & Dr. Pamela Gay

AstronomyCast 338: Copernicus by Fraser Cain & Dr. Pamela Gay

AstronomyCast 337: Photometry by Fraser Cain & Dr. Pamela Gay

AstronomyCast 336: Units of Measure by Fraser Cain & Dr. Pamela Gay

AstronomyCast 335: The Photoelectric Effect by Fraser Cain & Dr. Pamela Gay

AstronomyCast 334: Chelyabinsk, One Year Later by Fraser Cain & Dr. Pamela Gay

AstronomyCast 333: When Worlds Collide by Fraser Cain & Dr. Pamela Gay

AstronomyCast 332: Stellar Collisions by Fraser Cain & Dr. Pamela Gay

AstronomyCast 331: Arthur C. Clarke's Ideas and Technology by Fraser Cain & Dr. Pamela Gay

AstronomyCast 330: Arthur C. Clarke by Fraser Cain & Dr. Pamela Gay

329: Telescope Making, Pt. 3 by Fraser Cain & Dr. Pamela Gay

AstronomyCast 328: Telescope Making, Pt. 2 by Fraser Cain & Dr. Pamela Gay

AstronomyCast 327: Telescope Making, Pt. 1 by Fraser Cain & Dr. Pamela Gay

AstronomyCast 326: Atmospheric Dust by Fraser Cain & Dr. Pamela Gay

AstronomyCast 325: Cold Fusion by Fraser Cain & Dr. Pamela Gay

AstronomyCast 324: Sun Grazers by Fraser Cain & Dr. Pamela Gay

AstronomyCast 323: Isotopes by Fraser Cain & Dr. Pamela Gay

AstronomyCast 322: SOHO by Fraser Cain & Dr. Pamela Gay

AstronomyCast 321: Solar Flares by Fraser Cain & Dr. Pamela Gay

AstronomyCast 320: Layers of the Sun by Fraser Cain & Dr. Pamela Gay

AstronomyCast 319: The Zodiac by Fraser Cain & Dr. Pamela Gay

AstronomyCast 318: Escape Velocity by Fraser Cain & Dr. Pamela Gay

AstronomyCast 317: Observatories by Fraser Cain & Dr. Pamela Gay

AstronomyCast 316: Observational Vs. Experimental Science by Fraser Cain & Dr. Pamela Gay

Who knew that destruction could be so informative? Only by smashing particles together with more and more energy, can we truly tease out the fundamental forces of nature. Join us to discover the different kinds of accelerators (both natural and artificial) and why questions they can help us answer.

AstronomyCast 314: Acceleration by Fraser Cain & Dr. Pamela Gay

AstronomyCast 313: Precession by Fraser Cain & Dr. Pamela Gay

AstronomyCast 312: The Inverse Square Law & Other Strangeness by Fraser Cain & Dr. Pamela Gay

AstronomyCast 311: Sound by Fraser Cain & Dr. Pamela Gay

AstronomyCast 309: Creating a Science-y Society by Fraser Cain & Dr. Pamela Gay

AstronomyCast 308: Climate Change by Fraser Cain & Dr. Pamela Gay

AstronomyCast 307: The Pacific Ring of Fire by Fraser Cain & Dr. Pamela Gay

AstronomyCast 306: Accretion Discs by Fraser Cain & Dr. Pamela Gay

AstronomyCast 305: The Spacecraft That Wouldn't Die by Fraser Cain & Dr. Pamela Gay

AstronomyCast 304: Death of a Spacecraft by Fraser Cain & Dr. Pamela Gay

AstronomyCast 303: Equilibrium by Fraser Cain & Dr. Pamela Gay

AstronomyCast 302: Planetary Motion in the Sky by Fraser Cain & Dr. Pamela Gay

AstronomyCast 301: Planetary Migration by Fraser Cain & Dr. Pamela Gay

AstronomyCast 295: The Observable Universe by Fraser Cain & Dr. Pamela Gay

AstronomyCast 300: What We've Learned in Almost 7 Years by Fraser Cain & Dr. Pamela Gay

AstronomyCast 299: Space Stations, Pt. 4: Future Space Stations by Fraser Cain & Dr. Pamela Gay

AstronomyCast 298: Space Stations, Pt. 3: The International Space Station by Fraser Cain & Dr. Pamela Gay

AstronomyCast297: Space Stations, Pt. 2: Mir, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 296: Spacestations, pt. 1, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 294: Arecibo Observatory, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 293: Earthquakes, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 292: The Oort Cloud, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 291: Shockwaves, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 290: Failed Stars, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 289: Cherenkov Radiation, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 288: Phases of Matter, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 287: E = mc2, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 283: Stellar Motion, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 286: How to Debunk and End-of-the-World Myth, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 285: How the World Will Really End, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 284: Optics, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 282: Seasons, by Fraser Cain & Dr. Pamela Gay

AstroCast 281: Explosions in Space, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 280: The Cosmological Constant, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 279: The Hubble Constant, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 278: Animals in Space, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 277: Orbit, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 276: XMM Newton, by Fraser Cain & Dr. Pamela Gay

Universe Today needs your help. Support the site and enrich your life at the same time by buying our mobile app: Phases of the Moon, for both Android and iPhone. The app is only $.99 in the store or .

AstronomyCast 275: Isaac Newton, Pt. 1, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 274: The Asteroid Vesta, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 273: Solutions to the Fermi Paradox, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 272: Abiogenesis, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 271: Who Does What in Space & Astronomy? by Fraser Cain & Dr. Pamela Gay

AstronomyCast: Live from DragonCon 2012, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 270: Inertia, by Fraser Cain & Dr. Pamela Gay

We'll be back for with a live show at Dragon*Con 2012 at the Labor Day Weekend.

AstronomyCast 269: Mass, by Fraser Cain & Dr. Pamela Gay

This week we talk about the new moon discovered orbiting Pluto (P5), New Horizons doing science in it's sleep, a southern polar vortex on Titan, and Pluto moon orbits, et cetera. We are joined by Robert Nemiroff, Jason Major, Alan Boyle, Michael Wall, Amy Shira Teitel and special guest Mark Showalter of SETI. Hosted by Fraser Cain.

AstronomyCast 268: Energy, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 267: Infinities, by Fraser Cain & Dr. Pamela Gay

It's time to look deep into history to the birthplace of modern mathematics - Ancient Greece. And the most famous mathematician of the time was Archimedes. We use many of his mathematical theories and inventions to this day; others are steeped in legend and mystery.

We can thank Arthur Eddington for much of our current understanding of stars. He provided some of the breakthrough concepts that explain what's going on, deep inside the hottest places in the Universe. Sadly, the spacecraft associated with his name wasn't so successful.

This week we talk about: Black Holes as particle detectors, New advances in Chinese space exploration, Asteroid research, History of women in space. We're joined by Amy Shira Teitel, Alan Boyle, Ian O'Neill, and Michael Wall. Hosted by Fraser Cain

This week we talk about: Lakes on Titan, Mars Curiosity landing, Earth-type worlds more common, NuSTAR Mission launch. We are joined by Amy Shira Teitel, Emily Lakdawalla, and Nicole Gugliucci

AstronomyCast 264: The Hazards of Space Flight, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 263: Radioactive Decay, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 262: Solar Sails, by Fraser Cain & Dr. Pamela Gay

In this week's Weekly Space Hangout, we talk about the Transit of Venus, the transfer of the space shuttle Enterprise, the future of commercial space exploration, and the new movie Prometheus. We're joined by Alan Boyle from http://cosmiclog.msnbc.msn.com/ and Amy Shira Teitel from http://www.amyshirateitel.com/

AstronomyCast 261: Lasers & Masers in Astronomy, by Fraser Cain & Dr. Pamela Gay

In this episode of the Weekly Space Hangout, we're joined by special guest Robert Nemiroff from Astronomy Picture of the Day. We also talked about the return of the SpaceX Dragon capsule, a manned mission to Venus, nomadic planets and the announcement of the Square Kilometer Array. Our team included: Amy Shira Tietel, Jason Major, Alan Boyle, Nicole Gugliucci and Robert Nemiroff

AstronomyCast 260: Lasers & Masers, by Fraser Cain & Dr. Pamela Gay

Sorry for the lack of a Hangout last week, we had massive internet fail in Fraser's home city. This week, we talk about: Building a real starship Enterprise, preparations for the annular solar eclipse, investigation into the Gaia theory, fuel for black holes, Hubble and the transit of Venus. We're joined by Amy Shira Teitel, Jason Major, Nancy Atkinson, Nicole Gugliucci, Phil Plait.

AstronomyCast 259: The Exploration of Venus, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 258: Viking Landers, by Fraser Cain & Dr. Pamela Gay

In this episode we talked about asteroid mining, SpaceX delays, Shuttle retirement, killer black holes, supermassive planets (aka brown dwarfs), Enceladus/Dione flybys, and missions to Jupiter.

AstronomyCast 257: Viking Orbiter, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 256: Resolution, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 254: Reflection & Refraction, by Fraser Cain & Dr. Pamela Gay

In this episode of the Weekly Space Hangout, we talk about two different asteroid close passes, the solar storms buffeting the Earth, a recent space exploration conference, and a team of amateur astronomers flashing the space station. We're also joined by Ryan Kobrick - Executive Director of Yuri's Night - to talk about the upcoming festivities.

AstronomyCast 255: Observing Hydrogen, by Fraser Cain & Dr. Pamela Gay

Another week, another space roundup. This week we talk about the redefinition of the term "Earthlike", salty soil on Mars, how you can participate in SETI, asteroid dust from Hayabusa, and the dangers of a warp drive.

AstronomyCast 253: Rayleigh Scattering, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 251: Messier Objects, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 252: Heisenberg's Uncertainty Principle, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 250: Precision, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 249: Schrödinger's cat, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 248: The Carina Constellation, by Fraser Cain & Dr. Pamela Gay

Another edition of our weekly space hangout. This week we talked about a week of space remembrance, solar storms, Newt's plans for a 2020 lunar base, arsenic and old news, black holes and their galaxies and the death of Phobos-Grunt.

AstronomyCast 247: The Ages of Things, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 246: What If Something Was Different, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 245: Calendars, by Fraser Cain & Dr. Pamela Gay

This is a Google+ Hangout we did to discuss the announcement of Earth-sized planets discovered by NASA's Kepler mission. Moderated by Fraser Cain from Universe Today/Astronomy Cast, with Nancy Atkinson from Universe Today, Dr. Phil Plait from Bad Astronomy, Emily Lakdawalla from the Planetary Society and Alan Boyle from MSNBC's Cosmic Log.

AstronomyCast 244: Io, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 243: The Tunguska Event, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 242: The Turino Scale, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 241: Astrophotography | Pt. 3: Image Processing by Fraser Cain & Dr. Pamela Gay

AstronomyCast 240: Astrophotography | Pt. 2: Techniques, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 239: Astrophotography | Pt. 1: The Gear, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 238: Solar Activity, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 237: Spooky Space Sounds, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 236: Einstein Was Right, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 235: Einstein, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 234: Lunar Phases, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 233: Radar, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 232: Galileo Spacecraft, by Fraser Cain & Dr. Pamela Gay

AstronomyCast: Live at Dragon*Con, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 231: Galileo Galilei, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 230: Christiaan Huygens, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 229: The Cassini Mission, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 228: Giovanni Cassini, Pt. 1, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 227: The Big Dipper, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 226: Weather, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 225: Ice in Space, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 224: Orion, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 223: The Transit of Venus, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 222: The Decadal Survey, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 221: Geomorphology, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 220: Mass Extinction Events

AstronomyCast 219: The Planck Mission, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 217: Stellar Classification, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 218: Max Planck Pt. 1, by Fraser Cain and Dr. Pamela Gay

AstrnomyCast 216: Archeo-Astronomy, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 215: Light Echoes, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 214: Space Tourism, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 213: Supermassive Black Holes

AstronomyCast 212: GPS Navigation, by Fraser Cain & Dr. Pamela Gay

AstronomyCast 211: Celestial Navigation

AstronomyCast 210: The Mars Exploration Rovers: Spirit & Opportunity

AstronomyCast 209: Exotic Life

AstronomyCast 208: The Spitzer Space Telescope

AstroCast 207: Lyman Spitzer

AstronomyCast 206: Fission

AstronomyCast 205: Fusion

AstronomyCast 204: Temperature

AstronomyCast 203: Europa

AstronomyCast 202: The Planets at Gliese 581

AstronomyCast 201: Titan

AstronomyCast 200: The Mariner Program

AstronomyCast 199: The Voyager Program

AstronomyCast 198: How is a Space Mission Chosen?

AstronomyCast 196: Luminosity & Magnitude

AstronomyCast 195: Planetary Rings by Fraser Cain & Dr. Pamela Gay

AstronomyCast 194: Dwarf Planets

AstronomyCast 193: Astronomy with the Unaided Eye

AstronomyCast 192: The Chandra X-Ray Observatory

AstronomyCast 191: Chandrasekhar

AstronomyCast 190: The Kepler Mission

AstronomyCast 189: Johannes Kepler and His Laws

AstronomyCast 187: The History of Astronomy | Pt. 5, The 20th Century

AstronomyCast 188: The Future of Astronomy

AstronomyCast 186: History of Astronomy | Pt. 4, Beginning of Modern Astronomy

AstronomyCast 185: History of Astronomy | Pt. 3, The Renaissance

AstronomyCast 184: History of Astronomy | Pt. 2, The Greeks

AstronomyCast 183: History of Astronomy | Pt. 1, The Ancient Astronomers

AstronomyCast 182: Astrometry

AstronomyCast 181: Rotation

AstronomyCast 180: Albedo

AstronomyCast 179: Mysteries of the Universe, pt. 2

AstronomyCast 178: Mysteries of the Universe, pt. 1

AstronomyCast 84: Getting Around the Solar System

AstronomyCast 177: Mysteries of the Milky Way, pt. 2

AstronomyCast 176: Mysteries of the Milky Way, pt. 1

AstronomyCast 175: Mysteries of the Universe, pt. 2

AstronomyCast 174: Mysteries of the Universe, pt. 1

AstronomyCast 173: The Herschel Space Observatory

This week we continue the story of galaxy formation, learning how groups of galaxies come together to form the biggest structures around – galaxy superclusters. And when you look at the Universe at this scale, environment is everything.

AstronomyCast 172: William Herschel

AstronomyCast 171: Solar System Movements & Positions

AstronomyCast 170: Coordinate Systems

AstronomyCast 169: The Fermi Mission

We finally get organized enough deal with several listener questions: isn�t dark matter just regular stuff we can�t see? how can parts of the Universe be expanding faster than the speed of light? what will Betelgeuse look like when it explodes as a supernova? what�s the speed of gravity? All these and more questions are answered.