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Hubble Sees Galaxy Cluster Warping Space and Time

Bringing some of the mysteries of the universe a little closer to home.

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Owlscrying
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Unread post Sat Dec 02, 2017 8:38 pm

Galaxy clusters such as this one contain thousands of galaxies of all ages, shapes and sizes, together totaling a mass thousands of times greater than that of the Milky Way. These groupings of galaxies are colossal — they are the largest structures in the Universe to be held together by their own gravity.

Clusters are useful in probing mysterious cosmic phenomena like dark energy and dark matter, which can contort space itself. There is so much matter stuffed into a cluster like Abell 2537 that its gravity has visible effects on its surroundings. Abell 2537’s gravity warps the very structure of its environment (spacetime), causing light to travel along distorted paths through space. This phenomenon can produce a magnifying effect, allowing us to see faint objects that lie far behind the cluster and are thus otherwise unobservable from Earth. Abell 2537 is a particularly efficient lens, as demonstrated by the stretched stripes and streaking arcs visible in the frame. These smeared shapes are in fact galaxies, their light heavily distorted by the gravitational field of Abell 2537.

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Owlscrying
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Unread post Sat Dec 02, 2017 8:40 pm

Image
Credit: ESA/Hubble/NASA

This picturesque view from the NASA/ESA Hubble Space Telescope peers into the distant universe to reveal a galaxy cluster called Abell 2537.

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Owlscrying
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Unread post Sat Dec 02, 2017 9:33 pm



Hubble view of galaxy cluster Abell 1689, located 2.2 billion light-years away in the constellation of Virgo. This huge cluster acts as a giant gravitational lens, magnifying and distorting the light from distant objects lying behind it, making it possible to see distant regions of space.

 

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