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.

On Earth, we can use data from hundreds and even thousands of seismometers to triangulate the location of an earthquake. On ...

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

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

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 ...

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

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

"In January, you'll have the opportunity to take in four bright planets in a sweeping view" said Preston Dyches of NASA's Jet ...

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 ...