This enormous chain of hundreds of galaxies—a cosmic filament—is twisting through space 400 million light-years away ...

You might think galaxies can’t ever find each other in our runaway cosmos, but it turns out gravity can sometimes overcome even the stretching of space itself ...

Physicist Sean Carroll explains how physics, astronomy, philosophy, and classics all help us understand the expanding ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Whether the universe will "end" at all is not certain ...

Long before telescopes and space travel, ancient civilizations had incredibly creative ideas about what the universe looked like and how it worked. These beliefs shaped culture, religion, and even ...