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    Galaxy Clusters tagged posts

    Hubble catches a Colossal Cluster

    April 17, 2018, Categories  Astronomy/Space

    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. 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. Credit: ESA/Hubble & NASA, RELICS

    This NASA/ESA Hubble Space Telescope image shows a massive galaxy cluster glowing brightly in the darkness. Despite its beauty, this cluster bears the distinctly unpoetic name of PLCK G308.3-20.2. Galaxy clusters can contain thousands of galaxies all held together by the glue of gravity...

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    Natural Telescope sets New Magnification Record

    February 5, 2018, Categories  Astronomy/Space

    The quiescent galaxy eMACSJ1341-QG-1 as seen by the Hubble Space Telescope. The yellow dotted line traces the boundaries of the galaxy's gravitationally lensed image. The inset on the upper left shows what eMACSJ1341-QG-1 would look like if we observed it directly, without the cluster lens. The dramatic amplification and distortion caused by the intervening, massive galaxy cluster (of which only a few galaxies are seen in this zoomed-in view) is apparent. Credit: Harald Ebeling, UH IfA

    The quiescent galaxy eMACSJ1341-QG-1 as seen by the Hubble Space Telescope. The yellow dotted line traces the boundaries of the galaxy’s gravitationally lensed image. The inset on the upper left shows what eMACSJ1341-QG-1 would look like if we observed it directly, without the cluster lens. The dramatic amplification and distortion caused by the intervening, massive galaxy cluster (of which only a few galaxies are seen in this zoomed-in view) is apparent. Credit: Harald Ebeling, UH IfA

    An international team of has discovered one of the most extreme instances of magnification by gravitational lensing...

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    Galaxy Clusters offer Clues to Dark Matter and Dark Energy

    August 30, 2017, Categories  Astronomy/Space

    A massive, young galaxy cluster seen in X-rays (blue), visible light (green), and infrared light (red). Image by X-ray: NASA/CXC/Univ of Missouri/M.Brodwin et al.; optical: NASA/STScI; infrared: JPL/CalTech

    A massive, young galaxy cluster seen in X-rays (blue), visible light (green), and infrared light (red). Image by X-ray: NASA/CXC/Univ of Missouri/M.Brodwin et al.; optical: NASA/STScI; infrared: JPL/CalTech

    It’s a cosmic irony: the biggest things in the universe can also be the hardest to find. Elizabeth Blanton, a Boston University associate professor of astronomy, started hunting for distant galaxy clusters more than 20 years ago. A single galaxy cluster can be as massive as a quadrillion suns, yet faraway clusters are so faint that they are practically invisible to all but the biggest Earth-bound telescopes. Distant clusters hold pieces of the story of how the web-like structure of the universe first emerged and could help illuminate the true nature of dark energy and dark matter.

    Now, ...

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    The Evolution of Massive Galaxy Clusters

    January 20, 2017, Categories  Astronomy/Space

    The evolution of massive galaxy clusters

    A multi-wavelength image of the distant massive galaxy cluster, IDCS J1426.5+3508 (X-rays from Chandra in blue, visible light from Hubble in green, and infrared data from Spitzer in red). A new millimeter wavelength study of massive clusters with the South Pole Telescope has found good agreement with current ideas about galaxy cluster evolution. Credit: NASA Chandra, Spitzer, Hubble

    Galaxy clusters have long been recognized as important laboratories for the study of galaxy formation and evolution...

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