Cosmology is already a complicated field of study, so switching up the variables is extra rough.

Whether the universe will “end” at all is not certain, but all evidence suggests it will continue being humanity’s cosmic home for a very, very long time.

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 ...

Where is the center of the universe? Learn why researchers say the rules may not apply to the center of the universe.

The Universe began 15 billion years ago in a fantastic explosion. It's the story we've been taught since first grade science, and cosmologists have held dear the aptly named big bang model for more ...

No one knows what kicked off the Big Bang that eventually allowed the stars to begin forming. Adolf Schaller for STScI, CC BY How can a Big Bang have been the start of the universe, since intense ...

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...

A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

The universe is expanding. That much is clearer. But it’s less clear whether this expansion is accelerating or slowing down.