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Most distant galaxy cluster discovered

Astronomers have glimpsed a 'protocluster' of galaxies as they appeared only a billion years after the Big Bang, making it the most distant galaxy cluster yet seen, a report in today's issue of the journal Nature announced.Full story

Biggest Galaxy Gang From Young Universe Seen

Galaxy cluster collisions energize cosmic rays

Some ancient galaxies had wild youth

Boomerang-shaped galaxy discovered

Astronomers have discovered an oddly bent galaxy that may help shed new light on how the most massive structures in the universe form and evolve. Full story

Chubby Galaxy Cluster Suggests Dark Energy Was Stronger Long Ago

Astronomers have created a new, incredibly detailed map of dark matter by using the Hubble Space Telescope to peer through a huge cluster of galaxies as if it were a cosmic magnifying glass. Full story

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Dark energy mystery illuminated by cosmic lens

Cosmic hit-and-run gives galaxy starry tail

'Deep flow' migrates deeper into the universe

Huge galaxy cluster hints at universe's skeleton

NASA spots most crowded space collision ever

Mysterious dark energy demystified

Antimatter eludes search efforts

Giant galaxy cluster seen in early universe

Astronomers discover missing matter

Related Photos

Boomerang-shaped galaxy
Boomerang-shaped galaxy

Astronomers have detected a strange, boomerang-shaped galaxy that reveals new details about the gas "filaments" connecting massive galaxy clusters. In this diagram, galaxies in a giant cluster are seen as dots. The hot gas filling the cluster and filament is shown in purple. The odd, bent galaxy is

Abell 1689
Abell 1689

This Hubble Space Telescope image shows the inner regions of the lensing galaxy cluster Abell 1689, which lies 2.2 billion light-years from Earth in the constellation Virgo. Light from distant background galaxies is bent by the concentrated dark matter in the cluster to produce a plethora of arcs

composite image of four separate galaxy clusters colliding
composite image of four separate galaxy clusters colliding

This composite image shows the massive galaxy cluster MACSJ0717.5+3745 (MACSJ0717, for short), where four separate galaxy clusters have been involved in a collision, the first time such a phenomenon has been documented.

Galaxy cluster
Galaxy cluster

The most crowded collision of galaxy clusters has been identified by combining information from NASA's Chandra X-ray Observatory, Hubble Space Telescope and the Keck Observatory on Mauna Kea, Hawaii.

These four dwarf galaxies are part of a census of small galaxies in the tumultuous heart of the nearby Perseus galaxy cluster. The images, taken by NASA's Hubble Space Telescope, are evidence that the undisturbed galaxies are enshrouded by a "cushion" of dark matter, which protects them from their r
These four dwarf galaxies are part of a census of small galaxies in the tumultuous heart of the nearby Perseus galaxy cluster. The images, taken by NASA's Hubble Space Telescope, are evidence that the undisturbed galaxies are enshrouded by a "cushion" of dark matter, which protects them from their r

These four dwarf galaxies are part of a census of small galaxies in the tumultuous heart of the nearby Perseus galaxy cluster. The images, taken by NASA's Hubble Space Telescope, are evidence that the undisturbed galaxies are enshrouded by a "cushion" of dark matter, which protects them from their r

Abell 85
Abell 85

This galaxy cluster, Abell 85, is located about 740 million light-years from Earth. The purple emission is multimillion-degree gas detected in X-rays by NASA's Chandra X-ray Observatory, and the other colors show galaxies in an optical image from the Sloan Digital Sky Survey. Abell 85 is one of 86 g