Sharmila Kuthunur

Large hailstones made of ammonia may explain why the gas is missing from large pockets of Jupiter's atmosphere.

Astronomers have stumbled upon yet another ghostly galaxy that appears to be devoid of dark matter, the elusive stuff that makes up most of the material universe.

NASA's Perseverance rover on Mars has discovered unusual "float" rocks on the rim of Jezero Crater while searching for signs of ancient microbial life. Scientists are investigating their origin.

SpaceX's Starlink internet satellite constellation has become a prime target for Russia and China, according to a new report assessing the counterspace capabilities of a dozen countries over the past year.

"What surprised us, at the end, was how effective this type of impact could be in explaining Mercury's unusual structure without needing to consider multiple collisions or extremely rare conditions."

NASA's Parker Solar Probe has completed is 2nd ultra-close flyby of the sun, and survived to transmit its data back to Earth.

After 11 years mapping the Milky Way, the European Space Agency's Gaia space telescope has retired. Scientists hailed it as "the discovery machine of the decade."

New observations with the Atacama Cosmology Telescope in Chile reveal the earliest-ever "baby pictures" of our universe, showing some of the oldest light we can possibly see.

When astronauts return from a prolonged visit to space, they are often carried out of their capsules and placed on stretchers. The 'stranded' astronauts Sunita Williams and Butch Wilmore were no exception. Here's why.

Our solar system's journey around the center of the Milky Way takes it through varying galactic environments, and one may have had a lasting impact on Earth's climate, according to a new study.

An ambitious new survey by the Hubble Space Telescope offers the first bird's-eye view of all known dwarf galaxies orbiting the Andromeda galaxy. The data suggests Andromeda had a chaotic past unlike anything scientists expected.

In world-first observations, the James Webb Space Telescope is watching two distant alien planets "spilling their guts into space" as they rapidly disintegrate — and scientists are elated at what they've found.

"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact."

"There is reason to have confidence in upward trajectory of the space economy."

Astronomers have used a continent-sized radio telescope to find the largest black hole jet ever observed in the early universe.

Black holes can actively regulate the material they consume, using powerful jets of gas blasted into space, according to a new study. It suggests many such cosmic beasts effectively "cook" their own meals.

A doorbell camera recorded a rare video of the moment a meteorite fell outside a home.

The first black hole that astronomers observed "turning off" just turned back on, releasing jets of hot gas into the cosmos.

The innermost Earth-like planet in the famous TRAPPIST-1 system might be capable of supporting a thick atmosphere after all, according to new research.

On Christmas Eve, NASA's Parker Solar Probe flew closer to the sun than any human-made object ever — a stunning technological feat that scientists liken to the historic Apollo moon landing in 1969. Now, we know it survived.

A display of auroras is expected to light up the skies on Christmas Day, thanks to a powerful M8.9 solar flare enroute to Earth.

Astronomers have discovered a pair of young stars near the supermassive black hole at the heart of our galaxy. Studying them can offer a rare glimpse into how stars can endure — at least briefly — the immense gravity exerted by such cosmic behemoths.

The odd atmosphere of a fledgling exoplanet is causing astronomers to question leading theories of how planets form.

Astronomers analyzing archival images from JWST have discovered an unexpectedly vast population of the smallest asteroids ever seen in the asteroid belt between Mars and Jupiter.