Cosmology | Page 3 of 25 | Astronomy.com

Euclid releases stunning first map of the deep sky

Abell 370

Cosmology, Galaxies, Science

Dark Energy Explorers: How you can help unravel one of the universe’s biggest mysteries

Cosmology, Galaxies

Early galaxies may be smaller than initially thought

galaxy cluster

Cosmology, Science

What we do — and don’t — know about dark energy

10 modern mysteries of the universe

The expanding universe

How can the visible universe be 46 billion light-years in radius when the universe is only 13.8 billion years old?

The mystery of dark energy: This Week in Astronomy with Dave Eicher

Cosmology, Science

How large is the universe? This Week in Astronomy with Dave Eicher

The Euclid image of the Horsehead Nebula, an iconic target for backyard astrophotographers and space telescopes alike. Credit: ESA.

Cosmology, Galaxies, Science, Stars

Euclid telescope releases first awe-inspiring images in dark universe hunt

An animation from the FLAMINGO simulation.

Watch the universe evolve in the most comprehensive simulation ever

The cosmic microwave background (CMB) is a snapshot of the early universe; it is the oldest light we can see. This light has been Doppler shifted into the microwave portion of the spectrum, outside the realm of naked-eye observing. In this image, generated with data from the Planck satellite, different colors represent tiny temperature fluctuations in the universe. Credit: ESA and the Planck Collaboration

Why is the night sky dark?

A frame from the Illustris Simulation

What is the cosmic web made of?