Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous neighbors, possibly after much of the ...

Sixty-six light-years away, an Earth-sized exoplanet completes an orbit in under six hours, skimming around its star at nearly one-hundredth the distance that Mercury orbits the Sun. This planet is on ...

NASA’s Double Asteroid Redirection Test, known as DART, did more than shove a small asteroid into a tighter loop around its ...

An oddly-behaving star led two UW astronomers to capture rare evidence of a collision between two planets in a distant solar ...

NASA's DART mission didn’t just change the orbit of Dimorphos, the asteroid it hit. It changed the orbit of the larger ...

The NASA DART spacecraft shifted the orbits of two asteroids around the sun after intentionally crashing into one of them.

Asteroids are some of the oldest objects in the solar system: leftovers from the chaotic time when planets were assembling ...

New observations have ruled out the chances of an asteroid hitting the moon in 2032, according to scientists using the James Webb Space Telescope.

NASA's DART mission launched from California changed not just the orbit of Dimorphos, the asteroid it hit, but the larger Didymos' path around the sun.