If you look across space with a telescope, you'll see countless galaxies, most of which host large central black holes, ...

Given how unfathomably large the universe is, it is perhaps understandable that we haven’t yet cracked all its secrets. But there are actually some pretty basic features, ones we used to think we ...

It’s always amazing, and more than a little humbling, when the universe reminds us that our “common sense” is provincial, ...

Just how large is the universe? The short answer is 93 billion light-years — at least. That 93 billion light-year number refers to what astronomers call the observable universe, and it extends about ...

A spiral galaxy, shaped much like our Milky Way, has been found in an era when astronomers believed such well-formed galaxies ...

A new paper suggests that our universe may have begun with two big bangs. Scientists proposed the idea after struggling for decades to explain both the mysterious beginning of the universe as well as ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

The Big Bang may not have been alone. The appearance of all the particles and radiation in the universe may have been joined by another Big Bang that flooded our universe with dark matter particles.

"Precision in these measurements is critical, as even subtle discrepancies could signal deviations from the model — ...

Many astronomers have wondered where the center of the universe is. If the Big Bang created the entire observable universe, then it stands to reason that the event had a point of origin. As it turns ...

Cosmic inflation tries to describe one brief but crucial phase in the Big Bang that launched the universe onto its expansion course. Many textbooks and science educators have attempted to describe the ...