Flying through Earth’s orbit are thousands of satellites and two operational space stations, including the International Space Station, which weighs as much as 77 elephants. The International Space ...

Millions of people around the world will pause on Tuesday, at least for a moment, to mark Earth Day. It's an annual event founded by people who hoped to stir activism to clean up and preserve a planet ...

July 9 will be one of the shortest days ever, as Earth is spinning faster and scientists are still working to understand why. According to the International Earth Rotation and Reference Systems ...

NASA astronaut Chris Williams captured the spectacle from the International Space Station on January 19. NASA explained: "A green and red aurora streams across Earth’s horizon above the city lights of ...