Galaxies | Astronomy.com

Andromeda’s star formation is slowing down

A James Webb Space Telescope image of a dense galaxy cluster filled with hundreds of galaxies of varying shapes, sizes, and colors against a black background. Three small white squares labeled A, B, and C mark gravitationally lensed images of a background quasar near the cluster center. At right, three zoomed-in inset panels labeled QSO1A, QSO1B, and QSO1C show each lensed quasar image as a small red point source.

Did this black hole grow up before its galaxy?

Hubble Space Telescope image of an irregular dwarf galaxy showing bright blue star clusters, pink star-forming regions, and a dusty golden core against a black starfield.

Exotic Objects, Galaxies

Active black holes are more common than we thought

A 360-degree panoramic view of the Milky Way galaxy stretching horizontally across the frame as a bright, glowing band of stars and dust. The galactic center is visible near the middle, dense with warm orange and brown dust lanes and bright star clusters. The surrounding sky is deep black, dotted with individual stars and a few faint nebulae and satellite galaxies visible in the lower portion of the image.

Cosmology, Galaxies

Giant supercluster discovered hiding behind the Milky Way

Today in the History of Astronomy

April 28, 1900: The birth of Jan Oort

Today in the History of Astronomy

April 22, 1724: The birth of Immanuel Kant

This Week in Astronomy

Explore the Virgo Cluster

NGC 4535: A galactic whirlpool of star formation

Cosmology, Galaxies

How can galaxies merge if the everything in the universe is moving apart?

Cosmology, Stars

Why not finding stars has astronomers on Cloud-9

Galaxies, Science

Fourteen galaxies whirl together on a cosmic carousel

Galaxies, Science

Researchers discover a grand-design spiral that shouldn’t exist