Astronomical lineups are quite common. However, what sets this month’s planetary parade apart is the number of bright planets ...

Caltech scientists published a study using NASA Curiosity rover imagery showing the past existence of warm water on Mars.

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

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

Venus, Mars, Jupiter, Saturn, Uranus, and Neptune—will be visible to stargazers on 25 January. This planetary parade offers a ...