The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for ...

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' ...

The 3.7-billion-year-old formations in the planet's Gale Crater suggest the presence of long-gone bodies of liquid water, ...

Experts told Newsweek about the difficulties of reaching Mars as the United States faces complex challenges in space policy.

New research reveals ancient ripples on Mars, providing compelling evidence of long-lost lakes that once existed 3.7 billion ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

The northern plains of Mars, marked by thousands of mounds and hills, hold significant evidence of the planet's watery past.

Six planets, Mars, Jupiter, Uranus, Neptune, Venus and Saturn can be seen in the night sky. You'll need binoculars or a ...

Rootless cones are small volcanic landforms ranging from several to several hundred meters in diameter, formed by continuous ...

Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic mission may investigate the area one day.

Four planets will be in the parade in January while seven will align in February. Here's how to see the events.

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...