Though it's a cold, dead planet, Mars still has its own natural beauty about it. This image shows us something we'll never ...

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 ...

The Mars Express orbiter launched to the Red Planet. Twenty years later, ESA has delivered a high resolution color image of Mars along with a time-lapse of "webcam" images that were released in near ...

Thousands of mysterious clay mounds found on Mars were formed by ancient water on the Red Planet's barren northern plains, ...

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

Exciting February sky events include Venus at its brightest and closest to Earth, the moon occulting the Pleiades, and a parade of planets in the post-sunset sky.

Living on Mars will be no easy feat. Building viable living quarters would require an inflatable habitat that can be covered ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

Earth is home to some truly bizarre and breathtaking landscapes — here are 20 that look straight out of an alien world.

One lucky East Lancashire stargazer caught a glimpse of the rare celestial phenomenon - the planetary alignment.

The United States will once again consider itself a growing nation, one that increases our wealth, expands our territory, ...

Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic ...