Tuesday, September 29, 2026

Strange giant planet TOI-1355 b set to vanish from view in 2033

Artist's impression of a hot Jupiter. (Credit: NASA, ESA, L. Hustak (STScI))

Since their first discovery in 1995, hot Jupiter exoplanets (hot Jupiters, for short) quickly challenged our understanding of exoplanet formation and evolution, including exoplanetary system architecture. This is because, as their name implies, they orbit at extremely close distances to their host stars, ranging from a few days to a few hours. Some of their orbits are even oval-shaped, called eccentric in the scientific community, meaning their orbit is oval-shaped. But could such an orbit cause a hot Jupiter to completely vanish from view, preventing astronomers from studying it?



The Rate of Starbirth is Crashing in the "Modern" Universe

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 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.



Measuring the Distance Between Quasar Pairs Just Got Easier

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)

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



A New Test Looks For A Subtle Twist In Ancient Light

Visualization of the rotation of E-modes to B-modes by cosmic birefringence. Credit: Anto Lonappan and Brian Keating, made with AI assistance.

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.



Monday, September 28, 2026

Diving into an Out-of-sync Galaxy

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

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 Does Its Job During First Orbital Flight

SpaceX's Starship rocket rises from its Texas launch pad for its first orbital flight. (Credit: SpaceX via X)

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.



Mars Has a Warm Region Inside

Studies of Mars using tidal tomography have found a strange warm spot under the southern hemisphere surface. Credit: Byrne, et al. University of Arizona.

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.