We know how the universe began. An event we call the Big Bang started it all about 13.8 billion years ago. How the universe ...

Astrophysicists have presumed for nearly a century that the universe will just keep expanding for all eternity, driven by an ...

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

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

About a century ago, scientists were struggling to reconcile what seemed a contradiction in Albert Einstein’s theory of general relativity. Published in 1915, and already widely accepted worldwide by ...

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 ...

Mathematical quirks of our universe have led some cosmologists to wonder whether the cosmos was actually born in a black hole ...

Earth and the surrounding Milky Way galaxy may be sitting inside a cosmic void—a "mysterious giant hole"—that could be speeding up the universe's expansion in our region compared to others, This is ...

Scientists have found a remarkably small yet bright object from the early universe that doesn’t make sense in our existing models of how stars and galaxies formed, even our own Milky Way. That means ...

Astronomers have long thought the universe should look generally the same in every direction, but an anomaly in the radiation ...

“You can journey to the ends of the earth in search of success,” 19th-century Baptist preacher Russell Conwell is said to have proclaimed, “but if you’re lucky, you will discover happiness in your own ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. About a century ago, scientists were struggling to ...