The NASA HALO capsule being built in Gilbert will serve as a habitat for astronauts orbiting the Moon before they launch ...

Valleys on Mars suggest the Red Planet was once covered in flowing water — but it's still a mystery how that could have been.

New research suggests ancient Mars may have been warm and wet, with rainfall or snowmelt carving its iconic valleys.

There are a lot of things in Earth's night sky, and every now and again, they line up in such a way to give us all a little ...

The world's most famous telescope is celebrating in style with new views of Mars, nebulas and a galaxy that reminds us of home.

Space exploration missions have revealed that polar vortices aren’t uncommon beyond Earth. They’ve been observed throughout ...

Mars may once have had a relatively warm and wet climate conducive to flowing water, rain and snow, producing a terrain much ...

“The discovery of abundant siderite in Gale Crater represents both a surprising and important breakthrough in our ...

Scientists are eager to find out whether Mars was once capable of supporting life, and according to new Curiosity findings, ...

Visit ancient Mars—a surprisingly temperate planet where snow or rain falls from the sky, and rivers rush down valleys to ...

With the most advanced craft available at the moment, the time needed to reach this planet will be 194,000 years ...

The surface of Mars is extremely cold, irradiated, and desiccated. But at one time, the planet was much warmer and wetter, ...