{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-572d6a42.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-f4d0de30.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Mystery of Galaxy’s Missing Dark Matter Deepens' data-url='/boclips/videos/627aa25df8eb5869271190c9' data-video-url='/boclips/videos/627aa25df8eb5869271190c9' 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\nMystery of Galaxy’s Missing Dark Matter Deepens\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'\u003eWhen astronomers using NASA’s Hubble Space Telescope uncovered an oddball galaxy that looks like it doesn’t have much dark matter, some thought the finding was hard to believe and looked for a simpler explanation. Dark matter, after all,...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eWhen astronomers using NASA’s Hubble Space Telescope uncovered an oddball galaxy that looks like it doesn’t have much dark matter, some thought the finding was hard to believe and looked for a simpler explanation. \u003cbr/\u003e\u003cbr/\u003eDark matter, after all, is the invisible glue that makes up the bulk of the universe’s contents. All galaxies are dominated by it; in fact, galaxies are thought to form inside immense halos of dark matter. \u003cbr/\u003e\u003cbr/\u003eSo, finding a galaxy lacking the invisible stuff is an extraordinary claim that challenges conventional wisdom. It would have the potential to upset theories of galaxy formation and evolution.\u003cbr/\u003e\u003cbr/\u003eCredit: NASA's Goddard Space Flight Center \u003cbr/\u003ePaul Morris: Lead Producer \u003cbr/\u003eAndrea Gianopoulos: Science Writer\u003cbr/\u003eTracy Vogel: Science Writer\u003cbr/\u003e\u003cbr/\u003eAdditional Visualizations:\u003cbr/\u003eGalaxy Motion Simulation: Credit: ESO/L. Calçada.\u003cbr/\u003eDark Matter Simulation: Credit: Wu, Hahn, Wechsler, Abel(KIPAC), Visualization: Kaehler (KIPAC)\u003cbr/\u003e\u003cbr/\u003eMusic Credits: \u003cbr/\u003e\"Aphelion Horizon\" by Alistair Hetherington [PRS] via Atmosphere Music Ltd. [PRS], and Universal Production Music.\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    Dark matter is the invisible glue that holds the universe together.\u003cbr/\u003e    0:06\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    Galaxy Motion Simulation Observed With Dark Matter\u003cbr/\u003e    0:16\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    Unlike observable matter, dark matter does not emit, absorb, or reflect light, making it hard to detect.\u003cbr/\u003e    0:43\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    In 2018, galaxy NGC 1052-DF2 made headlines because it seemed to be missing dark matter.\u003cbr/\u003e    1:06\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    The observed number of stars in NGC 1052-DF2 accounted for most of the gravity.\u003cbr/\u003e    1:18\u003cbr/\u003e  \u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e      \u003cbr/\u003e  \u003cbr/\u003e  \u003cbr/\u003e    A galaxy lacking dark matter is an extraordinary claim. It upsets theories of galaxy formation and evolution.\u003cbr/\u003e    1:36\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 class='rp-report'\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv aria-labelledby='resource-details-heading' class='rp-info-section'\u003e\n\u003ch2 class='title' id='resource-details-heading'\u003eResource Details\u003c/h2\u003e\n\u003cdiv class='rp-resource-details clearfix'\u003e\n\u003cdiv 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title=\"Mystery of Galaxy’s Missing Dark Matter Deepens\" onError=\"handleImageNotLoadedError(this)\" data-default-image=\"https://static.lp.lexp.cloud/images/attachment_defaults/resource/large/missing.png\" data-src=\"https://cdnapisec.kaltura.com/p/1776261/thumbnail/entry_id/1_1ubm7kgc/width/250/vid_slices/3/vid_slice/1\" width=\"315\" height=\"220\" src=\"data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs\" /\u003e\n\u003cspan aria-hidden='true' class='flex justify-center items-center bg-white rounded-full w-16 h-16 absolute top-1/2 left-1/2 -mt-8 -ml-8 cursor-pointer z-0 border-2 border-primary drop-shadow-md lp-boclips-thumbnail-playBtn'\u003e\n\u003ci class='fa-solid fa-play text-primary text-3xl ml-1 drop-shadow-xl'\u003e\u003c/i\u003e\n\u003c/span\u003e\n\u003c/a\u003e\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n"}