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JWST Unveils the Universe's Deepest "Jellyfish" Galaxy: An 8.5 Billion-Year-Old MarvelThe James Webb Space Telescope (JWST) has identified COSMOS2020-636829, the oldest known "jellyfish galaxy," showcasing the profound impact of ram-pressure stripping and cosmic winds in the early universe. This discovery reveals tentacle-like gas streams and young star formations, challenging previous cosmic timelines by illustrating harsh early galaxy cluster environments.

Deep in the early universe, 8.5 billion years ago, a galaxy is being torn apart.

Deep in the early universe, 8.5 billion years ago, a galaxy is being torn apart. Its gas is stripping away in long, star-forming tentacles. Astrophysicists from the University of Waterloo have spotted the most distant "jellyfish galaxy" ever seen. Using the James Webb Space Telescope (JWST), they peered into the COSMOS field—a patch of sky far from our own galaxy's dust.

The image highlights the discovery of 1,114 new Small Mare Ridges (SMRs) on the Moon, increasing the total to 2,634. These findings suggest recent tectonic activity, indicating the Moon is shrinking as its crust compresses. The implications include widespread sources of moonquakes and the necessity to reassess lunar landing sites for safety in future missions, especially the Artemis Program.

The Moon contracts, buckling its crust into ridges and scarps. A new study reveals these "wrinkles" are everywhere

As it cools, the Moon contracts, buckling its crust into ridges and scarps. A new study reveals these "wrinkles" are everywhere—and they might be dangerous. Unlike Earth, the Moon has no tectonic plates. It is a single-plate planet. Yet, it is seismically active. Why? Because it is shrinking.

Unveiling Galaxy CDG-2: This infographic details a "dark" galaxy where 99% of its mass is invisible dark matter. Stripped of star-forming gas and with a sparse stellar population, CDG-2 was detected using globular clusters as tracers. It is the first galaxy discovered solely via clusters, with its existence confirmed by data from Hubble, the Euclid space observatory, and the Subaru Telescope.

A galaxy made of 99% dark matter, betraying its presence only by four tiny clusters of stars.

In the shadows of a galaxy cluster, astronomers have found a phantom. A galaxy made of 99% dark matter, betraying its presence only by four tiny clusters of stars. Most galaxies shine bright. But CDG-2 is a "Low-Surface-Brightness" galaxy, so faint it's nearly invisible. It contains only a sparse scattering of stars.

Deep in the early universe, 8.5 billion years ago, a galaxy is being torn apart.

Deep in the early universe, 8.5 billion years ago, a galaxy is being torn apart. Its gas is stripping away in long, star-forming tentacles. Astrophysicists from the University of Waterloo have spotted the most distant "jellyfish galaxy" ever seen. Using the James Webb Space Telescope (JWST), they peered into the COSMOS field—a patch of sky far from our own galaxy's dust.

13 hours ago1 min read

The Moon contracts, buckling its crust into ridges and scarps. A new study reveals these "wrinkles" are everywhere

As it cools, the Moon contracts, buckling its crust into ridges and scarps. A new study reveals these "wrinkles" are everywhere—and they might be dangerous. Unlike Earth, the Moon has no tectonic plates. It is a single-plate planet. Yet, it is seismically active. Why? Because it is shrinking.

13 hours ago1 min read

A galaxy made of 99% dark matter, betraying its presence only by four tiny clusters of stars.

In the shadows of a galaxy cluster, astronomers have found a phantom. A galaxy made of 99% dark matter, betraying its presence only by four tiny clusters of stars. Most galaxies shine bright. But CDG-2 is a "Low-Surface-Brightness" galaxy, so faint it's nearly invisible. It contains only a sparse scattering of stars.

13 hours ago1 min read

Blog

The Fermi Paradox and the Search for Cosmic Intelligence

This is the heart of the Fermi Paradox, a term for the profound conflict between the sheer statistical probability that we should be surrounded by evidence of intelligent life and the observed reality of a silent, seemingly empty cosmos. For decades, our telescopes and radio receivers have heard nothing but silence.

Sandeep K S

Jan 11

M dwarf stars (Red Dwarfs)

When you look up at the night sky, the stars that catch your eye are often giants—luminous, massive beacons similar to, or much larger than, our own Sun. It’s natural to think of these bright points of light as typical. But this perception is a profound illusion.

Sandeep K S

Jan 11

What New Scar on the Moon Teaches Us?

Despite eons of gazing at the "Man in the Moon," many of us miss the fact that our celestial neighbor is still under construction. While the massive, basin-forming impacts ended billions of years ago, the Moon is still struck by asteroids and comets today. Catching these impacts is a challenge, but thanks to the Lunar Reconnaissance Orbiter Camera (LROC), we can now spot fresh craters that appeared almost overnight.

Sandeep K S

Nov 23, 2025