cluster

The Hyades star cluster (pink) curls across the sky amid well-known constellations (green). The cluster is at the center of a controversial new study proposing an alternative to Newton

Lopsided star cluster may disprove Newton and Einstein, controversial new study claims

Astronomers observing star clusters in our galaxy have found evidence that controversially challenges Newton’s laws of gravity and could upend our understanding of the universe. The puzzling finding could support a controversial idea that does away entirely with dark matter. The researchers found this evidence by observing open star clusters, or loosely bound groups of …

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New Webb images illuminate the formation of a galaxy cluster

New Webb images illuminate the formation of a galaxy cluster

Enlarge / Separating out different wavelengths of light lets us track the movement of material towards and away from Earth. A team of researchers is publishing a paper based on new images taken by the Webb Space Telescope. The images reveal a dense concentration of matter in the early Universe, potentially indicating early stages in …

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Astronomers Witness Light Delayed by Almost 7 Years as It's Warped by a Galaxy Cluster

Astronomers Witness Light Delayed by Almost 7 Years as It’s Warped by a Galaxy Cluster

Way back in 1979, astronomers spotted two nearly identical quasars that seemed close to each other in the sky. These so-called ‘Twin Quasars’ are actually separate images of the same object. Even more intriguing: the light paths that created each image traveled through different parts of the cluster. One path took a little longer than …

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The Oldest Fossil Radio Galaxy Discovered Yet Has Been Found Hiding in a Cluster

The Oldest Fossil Radio Galaxy Discovered Yet Has Been Found Hiding in a Cluster

If we had been around and able to see into the heart of galaxy cluster Abell 980 around 260 million years ago, we may have seen something very spectacular indeed. The brightest galaxy in the cluster erupted, the result of activity from its supermassive black hole, an event that would go on to blow massive …

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a field of stars

We found some strange radio sources in a distant galaxy cluster. They’re making us rethink what we thought we knew.

The colliding cluster Abell 3266 as seen across the electromagnetic spectrum, using data from ASKAP and the ATCA (red/orange/yellow colors), XMM-Newton (blue) and the Dark Energy Survey (background map). (Image credit: Christopher Riseley (Università di Bologna)) This article was originally published at The Conversation. (opens in new tab) The publication contributed the article to Space.com’s …

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Strange Radio Sources in Distant Galaxy Clusters Defy Our Understanding

Strange Radio Sources in Distant Galaxy Clusters Defy Our Understanding

The Universe is littered with galaxy clusters – huge structures piled up at the intersections of the cosmic web. A single cluster can span millions of light-years across and be made up of hundreds, or even thousands, of galaxies. However, these galaxies represent only a few percent of a cluster’s total mass. About 80 percent …

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