Astronomers use many methods to determine this number, including gravitational lensing, the universe’s expansion rate, and more.

Modern cosmology reveals a universe expanding uniformly without a spatial center or edge. The Big Bang wasn't a localized ...

Astronomers using the Webb Telescope may have found a new type of object: cold, glowing black hole stars from the early ...

Astronomers have discovered "dust-shrouded supermassive black holes" in the early universe, less than 1 billion years after ...

For scientists, that has long posed a problem: According to physicists’ best current theories, matter and its counterpart, ...

Tiny red objects spotted by NASA's James Webb Space Telescope (JWST) are offering scientists new insights into the origins of ...

The universe exists because matter and antimatter are not good friends. Is there a scientific reason why the universe exists?

Astronomers uncovered seven dust-shrouded quasars from Cosmic Dawn, doubling the known tally of early supermassive black holes.

The James Webb Space Telescope has found a lonely black hole in the early universe that’s as heavy as 50 million suns. A ...

Long before galaxies sparkled in the sky or stars took shape, invisible forces stirred in the early Universe. One of those ...

"It's an elegant answer, really, because we thought it was a tiny galaxy full of many separate cold stars, but it's actually, ...