{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-c03aa079.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-517835be.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Hubble Uncovers Concentration of Small Black Holes' data-url='/boclips/videos/627aa1203f890d22456119a0' data-video-url='/boclips/videos/627aa1203f890d22456119a0' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nHubble Uncovers Concentration of Small Black Holes\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"384398\" href=\"/search?publisher_ids%5B%5D=384398\"\u003eNASA\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eAstronomers on the hunt for an intermediate-mass black hole at the heart of the globular cluster NGC 6397, found something they weren’t expecting: a concentration of smaller black holes lurking there instead of one massive black...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eAstronomers on the hunt for an intermediate-mass black hole at the heart of the globular cluster NGC 6397, found something they weren’t expecting: a concentration of smaller black holes lurking there instead of one massive black hole.\u003cbr/\u003e\u003cbr/\u003eVideo credit: NASA's Goddard Space Flight Center \u003cbr/\u003ePaul Morris: Lead Producer \u003cbr/\u003e\u003cbr/\u003eMusic: \u003cbr/\u003e\"Glass Ships\" by Chris Constantinou [PRS] and Paul Frazer [PRS] via Killer Tracks [BMI] and Universal Production Music.\u003cbr/\u003e\u003cbr/\u003eVisual Credits:\u003cbr/\u003eArtist’s Impression of the Black Hole Concentration in NGC 6397\u003cbr/\u003eVideo credit: ESA/Hubble, N. Bartmann\u003cbr/\u003e\u003cbr/\u003eCallout of the Black Hole Concentration in NGC 6397\u003cbr/\u003eVideo credit: ESA/Hubble, N. Bartmann\u003cbr/\u003e\u003cbr/\u003eArtist Rendition of Gaia Spacecraft\u003cbr/\u003eImage credit: ESA, C. Carreau\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e \u003cbr/\u003e---\u003cbr/\u003e \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    \u003cbr/\u003e      Chapters\u003cbr/\u003e      \u003cbr/\u003e    \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e  View all\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e    \u003cbr/\u003e       \u003cbr/\u003e    \u003cbr/\u003e    \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    At the core of the dense globular star cluster NGC 6397 lies an unexpected stellar graveyard.\u003cbr/\u003e    0:01\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    Globular clusters are spherical groups of stars tightly bound by gravity.\u003cbr/\u003e    0:13\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    These intermediate-mass black holes are the long-sought missing link in black hole evolution.\u003cbr/\u003e    0:35\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    but larger than stellar-mass black holes formed by the collapse of massive stars.\u003cbr/\u003e    0:58\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    Scientists hoped to find an intermediate-mass black hole at the heart of this globular cluster...\u003cbr/\u003e    1:08\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    but instead, they found stellar-mass black holes lurking there, the remains of collapsed stars.\u003cbr/\u003e    1:20\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    \u003cbr/\u003e       \u003cbr/\u003e    \u003cbr/\u003e    \u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='action-container flex justify-between'\u003e\n\u003cbutton aria-expanded='false' aria-label='Read more description' class='rp-full-description' type='button'\u003e\n\u003ci class='fai fa-solid fa-align-left'\u003e\u003c/i\u003e\n\u003cspan id='read_more'\u003eRead More\u003c/span\u003e\n\u003c/button\u003e\n\u003cdiv 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href=\"/search?grade_ids%5B%5D=249\u0026amp;grade_ids%5B%5D=250\u0026amp;grade_ids%5B%5D=251\u0026amp;grade_ids%5B%5D=252\u0026amp;grade_ids%5B%5D=253\u0026amp;grade_ids%5B%5D=254\u0026amp;grade_ids%5B%5D=255\u0026amp;grade_ids%5B%5D=256\u0026amp;grade_ids%5B%5D=257\u0026amp;search_tab_id=1\u0026amp;subject_ids%5B%5D=1216220\"\u003eAll Subjects\u003c/a\u003e\u003c/span\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003cdiv class='detail'\u003e\n\u003cdl\u003e\n\u003cdt\u003eMedia Type\u003c/dt\u003e\u003cdd\u003e\u003cspan\u003e\u003ca href=\"/search?grade_ids%5B%5D=249\u0026amp;grade_ids%5B%5D=250\u0026amp;grade_ids%5B%5D=251\u0026amp;grade_ids%5B%5D=252\u0026amp;grade_ids%5B%5D=253\u0026amp;grade_ids%5B%5D=254\u0026amp;grade_ids%5B%5D=255\u0026amp;grade_ids%5B%5D=256\u0026amp;grade_ids%5B%5D=257\u0026amp;search_tab_id=2\u0026amp;type_ids%5B%5D=4543647\"\u003eInstructional Videos\u003c/a\u003e\u003c/span\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003cdiv 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aria-labelledby='educator-ratings-heading' class='rp-info-section'\u003e\n\u003ch2 class='title sr-only' id='educator-ratings-heading'\u003eEducator Ratings\u003c/h2\u003e\n\u003cdiv id=\"educator-ratings-root\"\u003e\u003c/div\u003e\u003cdiv id=\"all-educator-ratings-root\"\u003e\u003c/div\u003e\u003cdiv id=\"educator-rating-form-root\"\u003e\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-resource'\u003e\n\u003cdiv aria-label='Show resource details' class='rp-show-info' role='button' tabindex='0'\u003e\n\u003ci class='fai fa-solid fa-align-left'\u003e\u003c/i\u003e\nShow resource details\n\u003c/div\u003e\n\u003cdiv aria-label='Video player' class='player' id='player-wrapper' role='region'\u003e\n\u003cdiv class='relative container mx-auto' id='lp-boclips-visitor-thumbnail'\u003e\n\u003ca class=\"block\" data-html=\"true\" data-placement=\"bottom\" data-trigger=\"click\" data-content=\"\u003cdiv class=\u0026quot;text-center py-2\u0026quot;\u003e\u003ca 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