Mars' moon Phobos may actually be a comet — or at ... Some have theorized that the moons are former asteroids lured in by Mars' gravity, because their chemical composition is similar to that ...

Phobos completes one orbit of Mars in just over seven and a half hours at an altitude of approximately 6000 kilometres. Thus, the moon moves around the planet ... either the moons are asteroids ...

One holds that Phobos and Deimos were passing asteroids captured by Mars. The other says a large impact on Mars ejected ...

It's called Deimos, and is much smaller and more mysterious than Phobos, the first moon ... which leads to an eerie effect around the moon. Because its gravity isn't that strong, the dust and ...

New research proposes that Mars’ moons, Phobos and Deimos ... The capsule rotated mid-flight to replicate Moon gravity for research payloads, including NASA-supported experiments on lunar ...

On the way to investigate the scene of a historic asteroid collision, a European spacecraft swung by Mars and captured rare images of the red planet's mysterious small moon Deimos, the European Space ...

Hera was using Mars in what is known as a gravity assist ... which may include shots of Phobos, the planet’s other moon. As with any planetary flyby, there were some nerves about whether ...