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Galaxy Cluster

A grouping of galaxies. The Milky Way belongs to a small cluster known as the Local Group, but other clusters can contain hundreds or thousands of galaxies. Clusters of galaxies, in turn, can group together to form superclusters.


Virgo, the virgin

Virgo October 4, 2011

Radio Programs

Milky Way Satellites A flock of galactic sheep August 17, 2023

Moaning Black Hole The sounds of a giant black hole August 6, 2023

Big Jellyfish Sculpting a galactic jellyfish May 19, 2023

Dark Matter “Seeing” the invisible universe February 13, 2023

Looking Up The best place for galaxy hunting April 3, 2022

Super Clusters Super star clusters in a nearby galaxy December 8, 2020

Sculptor Galaxies A galaxy with a dark void December 7, 2020

Hercules Galaxies A busy cluster of galaxies July 25, 2020

Andromeda Galaxies The orderly Andromeda galaxies October 12, 2018

Void Galaxy A galaxy that’s on its own September 8, 2018

Coma Galaxies Gluing together clusters of galaxies May 11, 2018

On the Move Tugging at the Milky Way February 13, 2018

Eridanus Cluster Galaxy clusters in the southern sky January 14, 2018

Seyfert’s Sextet Illumination in a dark sky September 28, 2017

Virgo Cluster Galaxies that hang out together April 18, 2017

Galaxies Galore Uncovering a whole bunch of galaxies February 13, 2017

Local Supercluster “Nesting” the structure of the universe January 13, 2017

Local Group II The Milky Way’s galactic entourage January 10, 2017

Local Group Our galactic neighborhood January 9, 2017

Featured Images

map of the local group of galaxies, with the milky way in the middle

The Gang's All Here August 16, 2023

composite image of ngc 1275, a giant galaxy in the middle of the perseus cluster

Loud Black Hole August 6, 2023

Ghostly clouds of hot gas glow bright blue against a background of many distant galaxies

Ghostly Gas March 31, 2023

field of galaxies from webb telescope

Pandora's Bounty February 16, 2023

First full-color James Webb Space Telescope image

First View July 11, 2022

view of the coma galaxy cluster

Galaxies Galore April 3, 2022

Copeland's Septet, a collection of galaxies

Sparkling Septet January 18, 2021

NGC 247, a galaxy in Sculptor

Galactic Dark Zone December 7, 2020

Galaxies around a supermassive black hole in the early universe

Entwined in a Dusty Web October 1, 2020

Hercules galaxy cluster

Galaxies Everywhere July 25, 2020

Abell 85

Heavyweights February 10, 2020

Hubble Space Telescope view of D100, a galaxy that is losing gas as it plummets into the Coma Cluster

Running Out of Gas January 25, 2019

The M81 Group of galaxies

Close Group March 28, 2018

Hubble view of Abel 370 galaxy cluster with intervening asteroids

Interlopers November 5, 2017

Seyfert's Sextet

Four-Member Sextet September 28, 2017

Combined radio and visual view of the Perseus galaxy cluster

Hot Halo June 21, 2017

Hubble Space Telescope image of galaxy cluster Abell 370

Galactic Pile-Up May 15, 2017

Hubble Space Telescope view of galaxy M100

Grand Spiral April 19, 2017

Galaxy map shows

Sailing Through the Galaxies February 13, 2017

Hubble Space Telescope view of a gravitational lens

Galactic Lens July 22, 2016

Galactic Baubles April 14, 2016

Ground-based view of Coma cluster of galaxies

Sparkling Galaxies March 29, 2016

Hubble Space Telescope image of spiral galaxy Messier 66

Evidence of an Encounter April 12, 2015

Hubble Space Telescope view of Abell 2744, a massive galaxy cluster

On the Frontier March 9, 2015

Gemini Observatory image of VV 166 galaxy group

Galaxies Galore January 11, 2015