Astronomers around the world have confirmed over 6,000 exoplanets, a milestone reached in September 2025. Billions more are waiting to be discovered.

A NASA mission designed to better understand space weather and its potential hazards is set to launch, alongside two other missions sharing the same rocket.

The known universe is full of shockingly huge things. Here are the largest planets, stars, galaxies, and structures we've ...

On the day of the 2025 autumnal equinox, the sun rises almost exactly due east and sets to the west. The months that follow ...