"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

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

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

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

Harvard scientists explain how Mars had warm spells billions of years ago, allowing rivers and lakes to exist.

And even that would be challenging. By Jonathan Corum The distance between Earth and Mars constantly shifts as they move around the sun, ranging from about 35 million miles to 250 million miles.

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

UK researchers have confirmed the existence of a “super Earth” located 20 light-years away that could reveal the existence of ...

These two planets are visible in the southwest sky.Mars is currently at opposition from the Sun. That means the Sun and the ...

DEADLY space radiation and rapid outbreaks of disease are just a few of the official Nasa dangers that visitors to Mars will ...

Scientists have studied Earth's REB in great detail ... during the southern spring, Mars is at its closest to the sun, which maximizes the solar energy the planet receives. The energy surplus ...