Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...

In a celestial event known as a great alignment the five planets will be discernible with the naked eye, but to see Neptune ...

Don't put your binoculars away just yet, the planet parade continues through February. Here's which planets will be visible this month.

There are eight planets in the solar system, and each travels on its own path around the sun. But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some ...