On the martian surface, would the moons Deimos and Phobos be visible to the unaided eye? David De RooSilver Spring, Maryland ...

Each Monday, I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the Northern Hemisphere). Check my main feed for more in-depth articles ...

Phobos is the larger and innermost of Mars' two moons, and it's a fascinating celestial body. It's small, irregularly shaped, and orbiting just about 6,000 kilometers above the surface of the Red ...

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 ...

Mars’ moons are easily visible at night from the surface of the Red Planet. Phobos – the nearer, larger, and brighter of the two – would be obviously non-round. A sharp-eyed observer would be able to ...