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galaxy clusters Articles | Developments Today

The MACS J0308.9+2645 cluster, as captured by Webb's Near-Infrared Camera (NIRCam). Credit: NASA/ESA/CSA/STScI

Webb Archive Search Uncovers New Early-Universe Arc Candidate

A public-data search found a new gravitational arc candidate in Webb observations of MACS J0308.9+2645.
Researcher Homer Dávila Gutierrez reviewed 54 JWST/NIRCam fields and 1,591 possible candidates.
The result highlights how archival Webb data can still produce new early-universe discoveries.

DE

DT Editorial Team·Aug 9, 2026·via universetoday.com

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This NASA Hubble Space Telescope image features a swarm of galaxies in the galaxy cluster called CL0016+1609 or MACS J0018.5+1626. Credit: NASA/ESA/STScI/H. Ebeling/D. Coe/G. Kober

Hubble and Chandra Reveal a Cluster Collision in Deep Space

Hubble and Chandra observations show CL0016+1609 is two clusters merging along our line of sight.
Researchers are using gravitational lensing to measure the cluster’s dark matter distribution.
The image also includes RELICS data, underscoring the cluster’s value for studying distant galaxies.

DE

DT Editorial Team·Jun 29, 2026·via universetoday.com

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RAD-BAARG radio galaxy, with the 144 MHz radio image from the LOFAR radio telescope shown in red and the optical image from the BASS survey shown in RGB colour (Credit
Hota et al. (2026) and the RAD@home Collaboratory)

Astronomers Spot a Giant Bow Shock Around a Fast-Moving Galaxy

RAD-BAARG appears to show a giant bow shock nearly 1.8 million light years across.
Researchers think the galaxy is moving through cluster gas faster than sound travels in that medium.
Its distorted jets and arc-like radio emission make it unlike typical symmetric radio galaxies.
The object was identified through the LOFAR Two-metre Sky Survey, which is sensitive to faint radio structures.

DE

DT Editorial Team·Jun 26, 2026·via universetoday.com

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hubble

Hubble captures a galaxy cluster that doubles as a cosmic lens

Hubble imaged galaxy cluster MACS0329-0211 in visible and infrared light.
The cluster contains multiple galaxy types and faint lensed arcs.
Its mass bends and magnifies light from more distant background galaxies.

DE

DT Editorial Team·Jun 13, 2026·via science.nasa.gov

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(Main) An illustration of the supermassive black hole M87* (Inset) the NASA/JAXA mission XRISM

NASA's XRISM Spacecraft Peers Into the 'Eye of the Storm' Around Supermassive Black Holes

XRISM detected the most violent turbulence ever recorded in a galaxy cluster, centered on black hole M87*
The spacecraft can measure gas velocities around black holes for the first time, a capability no previous X-ray telescope possessed
Gas velocities are highest near the black hole and drop off rapidly, driven by turbulent eddies and outflowing shockwaves
The findings explain how black holes regulate cooling in galaxy clusters through active galactic nucleus feedback
Results were published in Nature and represent XRISM's showcase achievement since its 2023 launch

DE

DT Editorial Team·Feb 21, 2026·7 min read·via space.com

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