Here's when to see a pair of massive letters shining on the lunar surface around May's first quarter moon phase.

If you're planning to point a telescope at the moon this week, don't wait for the full moon. The best lunar views actually ...

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...

The Moon looks dramatic, but nothing is happening there. No tectonics, no erosion, no renewal. This video explains why the ...

Sometimes I look at the Moon and realize how little I actually know about it—what it's made of and how it formed. In this ...