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

NASA's Curiosity rover has made a groundbreaking discovery on Mars by uncovering pure sulfur crystals within a broken rock.

Stargazers will be treated to a dazzling six-planet "alignment" this January.

With frigid temperatures and dangerously cold wind chills, you may want to wait a few more days to check them out. Don't ...

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

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

Directly to the right of Orion is Jupiter and left of it is the unmistakable red disc of Mars. The best time to view the ...