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.

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

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

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our Solar System -- only the third ...

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

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

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

Scientists have discovered what might be only the third known interstellar object to pass through our solar system, the ...

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

NASA also points out that July and August is an excellent chance to view the constellation Aquila, also known as the eagle as ...

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

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