The case for a newborn ocean on Saturn's moon Mimas continues to build.

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

Another, even rarer view is to see our planet from the surface of another world—something, in fact, that first occurred only in 2004, when NASA’s Spirit rover on Mars snapped an image of Earth in that ...

Operated by SpaceX, the Starlink system includes over 6,000 small satellites in low-Earth orbit. The network aims to deliver ...