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Universe Today — Natural Sciences
Universe Today

Space and Astronomy News from Universe Today

Copyright: © Copyright Cosmoquest

Latest Episodes:

The cold molecular cloud Barnard 68 is a good example of the places where the material to form stars originates. A recent study shows that these clouds aren't being replaced as quickly as they used to be and star formation is slowing down over the past 4.5 billion years. Credit: ESO/VLT/FORS1 — The Rate of Starbirth is Crashing in the "Modern" Universe Sep 29, 2026
Show notes

The Universe has been making fewer stars lately and astronomers want to know why. The obvious answer is: there hasn't been enough starbirth material. But, is that true? Is some other process at play? An international team led by researcher Hong Guo of the Chinese Academy of Sciences decided to dig into the reasons why it looks like starbirth is falling off.

Artist’s conception showing the intense light from a pair of quasars in the cores of two galaxies in the process of merging. Credit: NASA/ESA/Joseph Olmsted (STScI) — Measuring the Distance Between Quasar Pairs Just Got Easier Sep 29, 2026
Show notes

A new way to accurately measure the distance between quasar pairs is showing promise through University of Alberta research.

Visualization of the rotation of E-modes to B-modes by cosmic birefringence. Credit: Anto Lonappan and Brian Keating, made with AI assistance. — A New Test Looks For A Subtle Twist In Ancient Light Sep 29, 2026
Show notes

The standard model of cosmology predicts that the Universe is homogeneous. A new study tests this using the polarization of the cosmic microwave background and finds this isn't quite true. This study supports an earlier study which also found a small polarization bias.

Artist's impression of the surface of a planet orbiting Proxima Centauri. Credit - ESO / M. Kornmesser — Older Alien Worlds Might Still Be Stuck in the Slime Age Sep 29, 2026
Show notes

There’s an active debate in the astrobiology community of where to use our best telescopes to look for our best chance of seeing alien life. That debate has been going on for decades, and will continue for some time to come, but now there’s another option up for consideration. A new paper in the International Journal of Astrobiology by Dr. Christopher Doughty of Northern Arizona University talks about how the total amount of carbon a planet is able to bring into the service of biology is a good indication of how evolved life on it might be.

The Seyfert galaxy NGC 1386 was part of a study of such galaxies that explored the actions of the central supermassive black hole and its effects on star formation in nearby regions. Credit: DESI Legacy Survey. — Supermassive Black Holes May Enhance Star Formation Sep 29, 2026
Show notes

The black holes at the hearts of galaxies get the credit and/or blame for a lot of things in their hosts. For example, they take the blame for gobbling up star-forming material, effectively "quenching" starbirth in some areas of galaxies. On the bright side, it now turns out that some of them may be commonly participating in the births of stars, too.

Image of the galaxy, A1689-zD1, which is one of four galaxies observed for this study. It is estimated to have existed about 700 million years after the Big Bang and was observed using the ALMA ground-based telescope. (Credit: Assistant Professor Yoshinobu Fudamoto from Chiba University, Japan) — Direct neutral gas found in galaxies 700M yrs post-Big Bang Sep 29, 2026
Show notes

Approximately 13.8 billion years ago, the Big Bang is hypothesized to have occurred, kickstarting our universe and eventually life on our small, blue world. While the Big Bang has yet to be directly observed, scientists have worked tirelessly to piece together the events that happened immediately after the Big Bang, specifically the first billion years or less, with the goal of gaining insight into the how the first stars, and potentially planets, formed and evolved.

The AlphaCube satellite unfurled within the ISS's Cupola. Credit: NASA/Rhodium Scientific — Cornell Lightsail Experiment Paves the Way for Interstellar Missions Sep 28, 2026
Show notes

Students in Cornell’s Space Systems Design Studio have published results from two lightsail experiments (Alpha CubeSat and Sailing to the Stars) built by engineering students at Cornell University.

The spiral galaxy NGC 4698 is a member of the Virgo Cluster of galaxies. Its serene vision hides the fact that it has a tail of hydrogen gas stretching away from it; the spin of its arms is decoupled from the spin of the stars and gas in the center, and its bulge stretches out in an odd shape. Credit: ESA/Hubble & NASA, D. Thilker, the MAUVE-HST Team — Diving into an Out-of-sync Galaxy Sep 28, 2026
Show notes

Galaxies are like snowflakes, no two exactly alike, even the spirals. The Hubble Space Telescope did a visual dive into the distant spiral NGC 4693 and found some intriguing hints to its past. For one thing, this member of the Virgo Cluster seems to have a central region that's rotating out of sync with the spiral arms and bulge. Those arms don't seem to connect to the central region, and the bulge itself seems to extend out above the plane of the galaxy.

SpaceX's Starship rocket rises from its Texas launch pad for its first orbital flight. (Credit: SpaceX via X) — SpaceX's Starship Rocket Does Its Job During First Orbital Flight Sep 28, 2026
Show notes

SpaceX sent its Starship super-rocket on its first orbital flight — a shorter-than-planned test mission that put operational Starlink satellites into orbit for the first time.

Studies of Mars using tidal tomography have found a strange warm spot under the southern hemisphere surface. Credit: Byrne, et al. University of Arizona. — Mars Has a Warm Region Inside Sep 28, 2026
Show notes

Something deep inside Mars has scientists looking for clues to its internal evolution. A team at the University of Arizona led by Alexander Byrne, used a technique called "tidal tomography" to probe a heat anomaly in the southern hemisphere mantle. It turns out this subsurface region measures about 200 to 400 degrees Celsius warmer than the rest of the mantle. That warm spot may contain information about how Mars has changed over its lifetime.

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