No matter how many missions to Mars she takes part in, the sheer joy of unearthing discoveries about the red planet never gets old for Mariek Schmidt.

Here’s what you should know when you go outside to see for yourself: Yes, the planets are indeed lined up across our sky. No, ...

Jeff Bezos’ rocket company has given NASA a brief taste of the moon’s gravity without straying too far from home.

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...