Giant space 'boulders' released by NASA's DART mission are not behaving as expected, revealing hidden risks of asteroid deflection.
Behold the 'Beast': A giant animal-shaped plasma plume 13 times wider than Earth hangs above the Sun.
'Interstellar visitor' 3I/ATLAS may be the oldest comet ever observed – and it could develop an impressive tail this year.
Scientists have recorded the most massive black hole merger in history – and it created a monster 225 times more massive than the Sun.
The Perseids Are Coming — Here's How to Watch This Magnificent Meteor Shower Before the Moon Ruins the Show
Vera K. Rubin Observatory: A Groundbreaking Mission to Create a 10-Year Time-Lapse Movie of the Universe