Dark matter is a mysterious, invisible substance that makes up most of the universe’s mass. Scientists can’t see it directly, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The James Webb ...

Scientists say the discovery will help to understand one of the biggest questions in astronomy: how do galaxies evolve?

Astronomers have discovered a giant radio galaxy with plasma jets stretching an incredible 3.3 million light-years—32 times ...