The two small moons of Mars, Phobos (about 22km in diameter) and Deimos (about 13km in diameter), have been puzzling scientists for decades, with their origin remaining a matter of debate. Some have ...

Six planets in the solar system have at least one moon. Both Earth and Mars are toward the lower end of the lunar count, as our home planet only has one moon, and Mars has two. But not all moons share ...

The star astrophysicist sat down with Newsweek to discuss Mars missions and what truly drives human discovery.

When astronauts set foot on Mars, it will be one of humanity’s greatest milestones. These first steps will be the result of decades of research, engineering, and imagination coming together, marking ...