Let me first tell you how mysterious dark energy is. Einstein added a cosmological constant to his equations to keep the ...

As I saw those distant galaxies shining in the darkness, a thought suddenly popped into my mind — what will the universe ...

Galaxies aren’t swelling and stars aren’t stretching—what’s expanding is far stranger. The very fabric of space itself is ...

The universe is made up of billions of galaxies. But what is a galaxy? Find out here.

Astronomers have observed two distant galaxies - both possessing roughly as many stars as our Milky Way - careening toward each other before their inevitable merger at a time when the universe was ...

NASA’s new JWST space telescope has revealed some cosmic surprises, including galaxies that might have assembled earlier than previously thought.

The Webb telescope has found four ancient galaxies, including one from when the universe was only 2% of its current age ...

Two colliding galaxies have been found to be reorganizing their dwarf satellites, potentially solving a major conundrum plaguing the standard model of cosmology.

Researchers say a cosmic collision could have created two galaxies that don’t contain the mysterious substance — but others cast doubt on the claim.

The Lambda Cold Dark Matter (LCDM) theory suggests that most galaxies are low-mass dwarf galaxies, many of which orbit larger galaxies like the Milky Way. More broadly, the LCDM represents our ...

A new discovery of "mini galaxies" has nearly tripled the number of known galactic satellites orbiting isolated dwarf galaxies, a discovery that can help us better understand dark matter.