The Sun's activity is what gives us beautiful auroras — but it also has dramatic negative effects on satellites that go ...

The evidence includes a ship's hull disappearing first over the horizon. I'm going to be the Earth, and this is the Moon. The Moon in the sky is lit up by the Sun ... in space, on Earth, or ...

You couldn’t tell the Earth was a sphere even if you hiked to the top of Mount Everest, which is 29,035 feet (8,850 meters) ...

Mercury is a little-known, still mysterious world. But one thing is certain. Mercury, the closest planet to the sun, can't ...

Stunning footage captured from the International Space Station shows a glorious-looking aurora shimmering above Earth.

NASA astronaut Don Pettit captured both an aurora and a docked SpaceX Dragon spacecraft at the International Space Station ...

In a groundbreaking astronomical finding, scientists have verify that Earth at this current moment has a second moon. This ...

It occurs when a full moon happens at the same time as the Moon's closest approach to Earth in its elliptical orbit - a point ...

It’s an exciting time for skywatchers right now, as not only is there the Leonid meter shower to look forward to, but there’s ...