The ESA spacecraft embarked on a two-year journey to the asteroid Didymos and its moonlet Dimorphos on Monday.

The Moon passes several planets as Jupiter’s Galilean moons delight and Saturn’s satellite Iapetus reaches western elongation ...

In this video, Astronomy magazine editor Dave Eicher invites you to observe a comet that’s becoming visible in the evening ...

Aurorae may be visible tonight as far south as Alabama, and high-frequency radio impacts have already been reported.