Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Earth's oceans could one day turn purple. Nearly three fourths of Earth is covered by oceans, making the planet look like a ...

We all know Mars is called “The Red Planet,” but have you ever stopped to wonder—why is it red? The classic joke explanation ...

Uranus Findings Can Aid the Study of Exoplanets Now more than 30 years into its mission, the Hubble Space Telescope has ...

NASA's vast archive of science data, over 100 petabytes and counting, is proving to be a timeless treasure trove for new ...

Earth's auroras look a bit different from above. NASA astronaut Don Pettit captured two amazing videos of our planet's ...

Catch two transits of Io, spot sparkling star clusters, and view Mars at aphelion while the April Full Moon lights the sky ...

When a star comes to the end of its life and dies, it can be an epic and destructive event, throwing out an explosion of heat and light — but it can create stunning new forms as well. A gorgeous new ...

In the waters off Iwo Jima, a volcanic island in Japan’s Satsuma archipelago, the sea has a distinct green tint. It’s not ...

For over 400 years, sailors have reported a mysterious phenomenon in which the ocean appears to glow as far as the eye can see.