The HiRise camera is living up to its name, capturing a rare look at the veteran rover from way up in Martian orbit.

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

NASA's Curiosity Mars rover used its Mast Camera, or Mastcam, to capture the view of Earth setting while Phobos is rising. The image shows Phobos on the left and Earth on the right. The scene ...

With a radius of 2,106 miles, Mars is the seventh largest planet in our solar system and about half the diameter of Earth. Its surface gravity is 37.5 percent of Earth’s. Mars rotates on its ...

That's because the moon is far closer to the Earth than Mars, so what you see depends on your point of view from Earth; the moon's position in the sky on any night can differ by about four times the ...

A reddish star is about to pass through a "beehive" of stars. That "star" is actually one of Earth's planetary neighbors.

on Earth, are produced by biological activity. While fatty acids can form without biological input, which may be the case on Mars, their existence on the Red Planet means that signs of life may be ...

A propulsion system that would attach to a spacecraft in Earth orbit, then carry the craft to its destination, the Sunbird has the potential to cut the journey time to Mars in half, Pulsar claims.

Why it's incredible: The lake is the only place on Earth that's similar to Jezero crater on Mars. Lake Salda is a body of water in Turkey that bears a strong resemblance to Mars' Jezero crater.

That's because the moon is far closer to the Earth than Mars, so what you see depends on your point of view from Earth; the moon's position in the sky on any night can differ by about four times ...