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.

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

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Scientists may have solved alongstanding mystery in the study of Mercury. For the first time, pieces of the Solar System’s ...

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

Mercury is the month's highlight, reaching greatest elongation July 4. Also on show in the Southern Hemisphere: Mars, Saturn, ...

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

Pieces of Mercury may have been found on Earth, potentially allowing scientists to study the Solar System's innermost planet.

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

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

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a ...

Mercury is a mystery. It’s the smallest planet in our solar system, the closest to the Sun, and one of the most extreme. Its ...