Mars Express orbiter captures a slightly elliptical crater measuring roughly 12 miles (20 kilometres) east to wes ...

The Geminid meteor shower has begun. The Geminids peak overnight on Dec. 13 and 14, when up to 150 "shooting stars" per hour ...

Radiation levels at airline flight altitudes briefly reached levels that could be potentially harmful to pregnant women.

Scientists are uncovering signs that Earth has been hit by powerful cosmic blasts that leave little trace on the surface yet ...

Right here on Earth are some outstanding examples of meteorite and asteroid impact craters and other visible impact structures. Click through and let these amazing crater destinations make an impact ...

Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

Find out what's up in your night sky during December 2025 and how to see it in this Space.com stargazing guide.

It is good to be back and there is plenty to explore in the December night sky. Starting on Tuesday is the comet C/2025 T1 Atlas, which makes its closest approach to the sun. There is a supermoon on ...