Mars has two moons, but they're not quite like Earth's moon. That's raised a lot of questions about where they're from, ...

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

Manhattan-sized comet 3I/ATLAS — which scientists suspect could have extraterrestrial origins — will reach its closest ...

Interstellar comet 3I/ATLAS is making a rare visit to our solar system, reaching perihelion near Mars' orbit on October 30, ...

Driving a spacecraft around a planet isn’t anything like driving on a planet. A physicist explains orbital navigation.

SpaceX on Thursday released the most detailed public update in nearly two years on its multibillion-dollar contract to land ...

As an astronomer studying the universe beyond Earth, I’m fond of “outside the box” views almost by default. But one of my favorites is whenever a spacecraft takes a snapshot of our home world and the ...