Cosmology | Page 6 of 24 | Astronomy.com

This colorful image shows a closeup of a portion of the Andromeda Galaxy’s (M31) disk. The Cepheid variable star M31-V1 is indicated with an arrow.

Cosmology, Galaxies, Stars

The star that changed the cosmos: M31-V1

Most distant dark matter ever found dates back 12 billion years

Cosmology, Galaxies

Envisioning extragalactic wonders beyond our Milky Way

Ask Astro: How did the Big Bang start from the size of a pinhead?

The physics of accretion: How the universe pulled itself together

Alien Life, Cosmology

Ask Astro: If the universe is 13.8 billion years old, shouldn’t other life have existed before us?

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