{"id":253446,"date":"2025-07-19T03:23:46","date_gmt":"2025-07-18T17:23:46","guid":{"rendered":"http:\/\/www.vibewire.com.au\/?guid=57ef2017efc4cfa8a985cfcd606087c7"},"modified":"2025-07-19T03:23:46","modified_gmt":"2025-07-18T17:23:46","slug":"hubble-snaps-galaxy-clusters-portrait-2","status":"publish","type":"post","link":"https:\/\/www.vibewire.com.au\/?p=253446","title":{"rendered":"Hubble Snaps Galaxy Cluster\u2019s Portrait"},"content":{"rendered":"
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\"A<\/a><\/figure>
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This NASA\/ESA Hubble Space Telescope image features the galaxy cluster Abell 209.<\/div>\n
ESA\/Hubble & NASA, M. Postman, P. Kelly<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n

A massive, spacetime-warping cluster of galaxies is the setting of today\u2019s NASA\/ESA Hubble Space Telescope<\/a> image. The galaxy cluster in question is Abell 209, located 2.8 billion light-years away in the constellation Cetus (the Whale).<\/p>\n

This Hubble image of Abell 209 shows more than a hundred galaxies, but there\u2019s more to this cluster than even Hubble\u2019s discerning eye can see. Abell 209\u2019s galaxies are separated by millions of light-years, and the seemingly empty space between the galaxies is filled with hot, diffuse gas that is visible only at X-ray wavelengths. An even more elusive occupant of this galaxy cluster is dark matter<\/a>: a form of matter that does not interact with light. Dark matter does not absorb, reflect, or emit light, effectively making it invisible to us. Astronomers detect dark matter by its gravitational influence on normal matter. Astronomers surmise that the universe is comprised of 5% normal matter, 25% dark matter, and 70% dark energy.<\/p>\n

Hubble observations, like the ones used to create this image, can help astronomers answer fundamental questions about our universe, including mysteries surrounding dark matter and dark energy. These investigations leverage the immense mass of a galaxy cluster, which can bend the fabric of spacetime itself and create warped and magnified images of background galaxies and stars in a process called gravitational lensing<\/a>.<\/p>\n

While this image lacks the dramatic rings that gravitational lensing can sometimes create, Abell 209 still shows subtle signs of lensing at work, in the form of streaky, slightly curved galaxies within the cluster\u2019s golden glow. By measuring the distortion of these galaxies, astronomers can map the distribution of mass within the cluster, illuminating the underlying cloud of dark matter. This information, which Hubble\u2019s fine resolution and sensitive instruments help to provide, is critical for testing theories of how our universe evolved.<\/p>\n

Text Credit: ESA\/Hubble<\/em><\/p>\n

Image credit: ESA\/Hubble & NASA, M. Postman, P. Kelly<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

A massive, spacetime-warping cluster of galaxies is the setting of today\u2019s NASA\/ESA\u00a0Hubble Space Telescope\u00a0image. The galaxy cluster in question is Abell 209, located 2.8 billion light-years away in the constellation Cetus (the Whale). This Hubble image of Abell 209 shows more than a hundred galaxies, but there\u2019s more to this cluster than even Hubble\u2019s discerning [\u2026]<\/p>\n","protected":false},"author":24,"featured_media":1,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[16946],"tags":[],"class_list":["post-253446","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-galaxy-clusters"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/253446","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=253446"}],"version-history":[{"count":3,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/253446\/revisions"}],"predecessor-version":[{"id":254693,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/253446\/revisions\/254693"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=253446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=253446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=253446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}