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, ...

One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at its closest point to Earth in its orbit, and Hall had one question on his ...

The universe has quasi-moons, mini-moons, and moonlets, but no official definition of what counts as a moon.

A space probe flying past Mars captured images of the red planet's small, mysterious moon. While on a flyby of Mars, Hera was able to use three of its imaging instruments to capture images of Deimos, ...

Hera, European Space Agency’s (ESA) flagship planetary defense mission that launched in October 2024, took images of Mars and Deimos, one of its two moons, March 12. The mission’s flyby was used as a ...

The smaller of Mars' two moons shines in the sky before sunrise on the Red Planet, as captured by NASA's Perseverance rover. NASA's Perseverance rover captured this pre-dawn view of Mars' moon Deimos ...

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

The solar system is a collection of celestial bodies held together by the sun's gravitational pull. Our solar system is located in the Milky Way galaxy. The solar system consists of eight planets, ...