The solar system's smallest planet is quickly approaching superior conjunction, so catch it in the morning sky while you can.

We were doing the typical planet vetting, and I happened to spot this signal that appeared very unusual.” An orbiting ...

The planet is "crumbling to pieces," shedding the equivalent of Mount Everest’s mass every 30.5-hour orbit and will be ...

What is the hottest planet in the solar system? If you want to know which is the hottest star in the solar system, this ...

Mineral grains evaporated from the planetary surface, however ... which is between that of Mercury and the moon. More massive terrestrial planets like the Earth have a stronger gravitational ...