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Hubble weighs in on mass of three million billion suns

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Hubble weighs in on mass of three million billion suns

Post by Dragon on Sun Jan 21, 2018 5:09 pm

In 2014, astronomers using the NASA/ESA Hubble Space Telescope found that this enormous galaxy cluster contains the mass of a staggering three million billion suns—so it's little wonder that it has earned the nickname of "El Gordo" ("the Fat One" in Spanish)! Known officially as ACT-CLJ0102-4915, it is the largest, hottest, and brightest X-ray galaxy cluster ever discovered in the distant Universe.

Galaxy clusters are the largest objects in the Universe that are bound together by gravity. They form over billions of years as smaller groups of galaxies slowly come together. In 2012, observations from ESO's Very Large Telescope, NASA's Chandra X-ray Observatory and the Atacama Cosmology Telescope showed that El Gordo is actually composed of two galaxy clusters colliding at millions of kilometers per hour.

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Re: Hubble weighs in on mass of three million billion suns

Post by Dragon on Sun Jan 21, 2018 5:12 pm


Credit: ESA/Hubble & NASA, RELICS

This image was taken by Hubble's Advanced Camera for Surveys and Wide-Field Camera 3 as part of an observing program called RELICS (Reionization Lensing Cluster Survey). RELICS imaged 41 massive galaxy clusters with the aim of finding the brightest distant galaxies for the forthcoming James Webb Space Telescope to study.

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Re: Hubble weighs in on mass of three million billion suns

Post by Dragon on Sun Jan 21, 2018 5:14 pm



Astronomers using the Chandra X-ray Observatory and ground-based optical telescopes have discovered an extraordinary galaxy cluster some 7.2 billion light years from Earth.

As the largest objects in the Universe that are held together by gravity, galaxy clusters can be used to study the mysterious phenomena of dark matter and dark energy.

 
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