redshift

The universe is about 13.8 billion years old, but how do we know that?

Astronomers have found that 400 galaxies, including our own, are being pulled toward

In 1986, astronomers discovered

Is there something wrong with the big bang theory, or is the theory of relativity itself wrong?

A very silly question about an obvious fact, though not everyone knows about it.

Cosmologists at University College London yesterday announced enlarged photographs and new findings about the MACS1149-JD1 galaxy, the farthest galaxy ever discovered.