The small, icy visitor now racing away from the inner solar system is not just another comet. It is an interstellar object, ...

Short-lived radioisotopes such as aluminum-26 influenced early solar system heat, water retention and the formation of Earth-like rocky planets, according to meteorite analyses and models.

There are about 15,000 satellites orbiting the Earth. Most of them, like the International Space Station and the Hubble ...

During its original network run in the 1960s, Star Trek was famously saved from cancellation twice by fan letter-writing ...

As we ring in another new year amid winter’s chill, columnist can’t help but wonder — why does the year start now, and not ...

Bright full moons, dazzling meteor shower displays and remarkable total eclipses will give stargazers plenty of reasons to ...