Mars, the fourth planet from the sun, is a dry, rocky world. Its famous red color has earned it the nickname the Red Planet. Mars has fascinated people throughout history, and today, it is one of ...

The view brightened again with Mariner 9, the first Mars orbiter. Though it could see no features smaller than a few football fields, its images suggested a more interesting, changeable world ...

The red planet Mars, named for the Roman god of war, has long been an omen in the night sky. And in its own way, the planet’s rusty red surface tells a story of destruction. Billions of years ...

On a flyby of Mars, the European Space Agency (ESA) captured a rare photo of its second moon - but what do we know about it? It's called Deimos, and is much smaller and more mysterious than Phobos ...