Not only is it difficult to understand what goes on beyond the limits of the solar system that our planet calls home, the ...

In an idealized universe with no external interference, even the most stubborn stars, called white dwarfs, would vanish after ...

Neutron stars are some of the weirdest cosmic objects, and the greatest mysteries lie deep in their hearts.

Dark matter makes up a large portion of the universe, but we've never seen it. Here's what we know, what it might be, and why it could change everything. More than 80% of the universe's matter is ...

The expiration date for the universe is now sooner than experts previously thought, new research suggests. But don't cancel your summer vacation, because it's still trillions of years in the future.