When Ann Walter looked outside her rural West Texas home, she didn't know what to make of the bulky object slowly drifting across the sky.

There once was a dream of cities in space — vast cylindrical habitats, self-sufficient and populated by millions who would ...

Astronaut Don Pettit, who is known for blending science with visual storytelling, recorded the scene during his current ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

The asteroid is roughly 1 to 3 metres across and was first spotted by the Catalina Sky Survey a few hours after it had passed ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty?