Cosmology | Page 6 of 23 | Astronomy.com

Quantum entanglement — when the states of two particle are intertwined by the laws of quantum mechanics — has long vexed physicists. But the phenomenon may also hold the key to understanding how time emerged. Credit: J Jurik Peter/Shutterstock

The struggle to find the origins of time

Ask Astro: How far away is the cosmic microwave background?

The Planck era: Imagining our infant universe

Cosmology, Galaxies

Astronomers discover the most distant galaxy yet

Saving cosmology with AI

Cosmology, Solar System

Earth Is spinning faster now than it was 50 years ago

Cosmology, Exotic Objects

Charting the universe in 3D

A brief history of time: What is it and how do we define it?

Cosmology, Galaxies

Ask Astro: Does dark energy create the voids between galaxy clusters?

Cosmology, Galaxies

Arp 91 showcases a cosmic union in deep space

Neutron stars are the perfect cosmic laboratory for the scientists who study them, thanks to their observability, extreme gravity, and strong magnetic fields. Credit: ESO/L. Calçada.

Exotic Objects, Stars

Neutron stars: A cosmic gold mine

Ask Astro: How much of the universe can we observe?