A distant world with carbon in its atmosphere and extraordinarily high temperatures is unlike any other planet we’ve seen, ...

One key component might be RNA, a molecular cousin of DNA found in every form of life on Earth, and now scientists say they ...

Using the XRISM space telescope, scientists spotted faint emissions of the elements in remnants of the Cassiopeia A supernova ...

Researchers using NASA's James Webb Space Telescope have detected the strongest evidence yet for an atmosphere on a rocky ...

The researchers showed that isotopes of supernovae, in particular Zr-96, were transported through interstellar space in the ...

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

An eye-catching pattern on the surface of Europa, an ice-covered moon, may have profound implications for our understanding ...

The mystifying 3I/ATLAS interstellar comet is blazing toward Earth and will in a matter of days come as close to our planet ...

A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth ...

Some 4.6 billion years ago, Earth was nothing like the gentle blue planet we know today. Frequent and violent celestial impacts churned its surface and interior into a seething ocean of magma—an ...

Scientists have long believed that the Moon was formed by a massive object crashing into the Earth. But what was that thing ...

A 2023 astronaut photo shows three dark hills, or mesas, towering above part of the Sahara desert in southern Mauritania. The ...