{"id":26485,"date":"2025-05-04T04:56:32","date_gmt":"2025-05-04T04:56:32","guid":{"rendered":"http:\/\/finn-family.com\/?p=26485"},"modified":"2025-05-04T04:56:32","modified_gmt":"2025-05-04T04:56:32","slug":"26485","status":"publish","type":"post","link":"http:\/\/finn-family.com\/?p=26485","title":{"rendered":""},"content":{"rendered":"<div><img src='https:\/\/apod.nasa.gov\/image\/2505\/blackholedisk_cfa_1080.jpg' style='max-width:600px;' \/><\/p>\n<div>How fast can a black hole spin? If any object made of regular matter spins too fast &#8212; it breaks apart. But a black hole might not be able to break apart &#8212; and its maximum spin rate is really unknown. Theorists usually model rapidly rotating black holes with the Kerr solution to Einstein&#8217;s General Theory of Relativity, which predicts several amazing and unusual things. Perhaps its most easily testable prediction, though, is that matter entering a maximally rotating black hole should be last seen orbiting at near the speed of light, as seen from far away. This prediction was tested by NASA&#8217;s NuSTAR and ESA&#8217;s XMM satellites by observing the supermassive black hole at the center of spiral galaxy NGC 1365. The near light-speed limit was confirmed by measuring the heating and spectral line broadening of nuclear emissions at the inner edge of the surrounding accretion disk. Pictured here is an artist&#8217;s illustration depicting an accretion disk of normal matter swirling around a black hole, with a jet emanating from the top. Since matter randomly falling into the black hole should not spin up a black hole this much, the NuSTAR and XMM measurements also validate the existence of the  surrounding accretion disk. via NASA <a href=\"https:\/\/apod.nasa.gov\/apod\/ap250504.html\"><\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>How fast can a black hole spin? If any object made of regular matter spins too fast &#8212; it breaks apart. But a black hole might not be able to <a href=\"http:\/\/finn-family.com\/?p=26485\" class=\"more-link\">[&hellip;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"Layout":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[9],"tags":[10,12],"class_list":["entry","author-admin","post-26485","post","type-post","status-publish","format-standard","category-whatsup","tag-ifttt","tag-nasa"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts\/26485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26485"}],"version-history":[{"count":1,"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts\/26485\/revisions"}],"predecessor-version":[{"id":26486,"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts\/26485\/revisions\/26486"}],"wp:attachment":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26485"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}