According to NASA, a low Earth orbit (singular) is any orbital trajectory that stays within 1,200 miles (2,000 kilometers) of ...

Earth Day occurs annually on April, 22. It began in 1970 and celebrates the environmental diversity of Earth and highlights ways of protecting it.

It's time to put an end to these myths, misconceptions, and inaccuracies about the universe.

Learn about the Earth with these 5 incredible facts about our planet, including the temperature of the Earth's core and Pangea.

Space exploration in real life is just as mind-blowing as it looks in the movies. Here are 16 facts you didn't know about the final frontier.

Our home planet holds some strange truths. These are the 20 weirdest facts about Earth, based on science from leading experts.

From extreme climates to peculiar creatures, here are some top facts about Earth.

The first piece of the International Space Station launched 15 years. To mark the outpost's 15 years in orbit here is a countdown of facts about the huge science lab in the sky.

In our galaxy alone, there are an estimated 8.8 billion habitable Earth-sized planets. The cosmos, it seems, is an amazingly massive place.

Today, April 22, is Earth Day, a time to appreciate our planet and the two-way relationship we have with it. It’s easy to take Earth for granted, since ...

These days, we have a lot of images of Earth from space. Which is awesome. But before we went to space, we had some ideas about what Earth might look like, too. Recently, the Library of Congress ...