They’re not a perfect match, but it’s way too hot on the first planet for us to hop over and confirm for ourselves.

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to oblivion ...

To get a glimpse of the “Swift Planet,” EarthSky suggests waiting for the sun to set before looking west for the planet ...

A meteor shower, a planet sighting, and a full moon. Here's how to see all of space's eye-catching activity in July.

As the closest planet to the Sun, Mercury is exposed to the star's enormous gravitational field. And it's really stressful.

Stars often whip their planets with solar winds and radiation, pull them ever closer with gravity and sear them with heat.

New research suggests that Mercury's crust is shifting and twisting in unexpected ways thanks to the force of the Sun.

Despite being covered in impact craters that could potentially send pieces of the planet into space, we have never found a ...

The sun rises from the east, and sets in the west - this is a well-established fact for the longest time, and this is due to ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in ...

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a sun-scorched, metal-rich world with a puzzling magnetic field and lavas ...