Interstellar comet 3I/ATLAS will make its closest approach to Earth on Friday. New X-ray images could shed light on its composition.

NASA's Hubble Space Telescope got a rare look at the aftermath of two cosmic collisions — and helped scientists solve a decades-old mystery. Many years ago, scientists saw a dense, bright spot near a young star called Fomalhaut. Scientists had stumbled on the dusty debris from two cosmic crashes.

A rare interstellar comet has been caught in X-rays by two space telescopes, revealing how its gases interact with charged particles from the sun as it travels through the inner solar system.

Real skeptics study the evidence and ask questions, rather than taking political dogma on faith. Experiencing disasters can open more eyes to the risks.

Mars and this natural beauty in Iran have a key ingredient in common: iron oxide, which is similar to how metals rust on Earth.

"We're not certain if having widespread liquid pockets instead of a global ocean makes Titan more or less habitable."

Saturn's giant moon Titan may not have a vast underground ocean after all. Titan instead may hold deep layers of ice and slush more akin to Earth’s polar seas, with pockets of melted water where life could possibly survive and even thrive, scientists reported Wednesday. The team led by researchers at NASA's Jet Propulsion Laboratory challenged the decade-long assumption of a buried global ocean at Titan after taking a fresh look at observations made years ago by NASA’s Cassini spacecraft aroun

The livestream will begin at 11 p.m. EST Dec. 18 (0400 GMT on Dec. 19), weather permitting.

Most of the footprints are elongated and made by bipeds. The best-preserved ones bear traces of at least four toes.

The National Oceanic and Atmospheric Administration’s annual Arctic report card shows how rapidly and profoundly climate change is warming and altering the region.

The 20th anniversary of the annual report tracks how sea ice, snow cover and many other vital signs of the Arctic have changed, and the impact that’s having on people and wildlife.

"This was an absolute surprise. It's extremely different from what we expected."

The direction, distance and motion of the comet through the sky during its closest approach could have made it seem like it was hovering over Bethlehem when Jesus was said to have been born.

The closer to Earth a satellite flies, the clearer a picture it can take of the surface. But low-flying satellites also have to deal with atmospheric drag.

Oxygen tank strapped to his back, Michael del Rosario moves his fins delicately as he glides along an underwater nursery just off the Dominican Republic coast, proudly showing off the “coral babies” growing on metal structures that look like large spiders. The conservationist enthusiastically points a finger to trace around the largest corals, just starting to reveal their vibrant colors. Del Rosario helped plant these tiny animals in the nursery after they were conceived in an assisted reprod

Membraneless organelles, also called biomolecular condensates, are changing how scientists think about protein chemistry, various diseases and even the origin of life.

December's faint Ursid meteor shower returns under dark skies, offering a small chance of unexpected activity.

Assuming Google does manage to launch a prototype in 2027, will it simply be a high-stakes technical experiment – or the dawning of a new era?

Dark stars are not exactly stars, and they are certainly not dark.

The annual Geminid meteor shower is set to peak this weekend, offering what is often one of the year's best and most reliable displays of shooting stars.

The Geminid meteor shower occurs as Earth passes through the debris from asteroid (3200) Phaethon

On Episode 189 of This Week In Space, Rod Pyle and Tariq Malik talk with their favorite Newspace Buccaneer, Jeffrey Manber.

Twins are pretty rare, accounting for just 3% of births in the US these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm.

Carbon dioxide emissions trap heat in the atmosphere, warming the planet. Too much CO2 can disrupt the climate and oceans.

With climate change steadily dismantling the icy habitat essential to their existence, new research suggests polar bears are rapidly rewiring their own genetics in a bid to survive

"The natural question that comes up is: how many more space telescopes will be affected when all these constellations are launched?"

Hawaiian stargazers got a particularly special treat recently.

Like a mood ring, clothing could let future space travelers know when they've been exposed to unsafe levels of radiation.

"Archaeologists did not expect to find such well-preserved structures in such a harsh setting," geologist Yves Fouquet said.

Super-Earth TOI-561b is about 40 times closer to its host star than Mercury is to the sun.