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.

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

For two decades, astronomers have chased a cosmic ghost: ultra‑massive “monster stars” that theory said must have existed but ...

Earth is about to see three total solar eclipses in just under two years, with each successive path of totality moving west ...

New research shows Karnak Temple was built on a rare island of high ground formed as Nile river channels shifted thousands of ...