{"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='NASA briefing on \u0026quot;dark energy\u0026quot;' data-url='/boclips/videos/5c54bfdad8eafeecae146487' data-video-url='/boclips/videos/5c54bfdad8eafeecae146487' 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\nNASA briefing on \u0026quot;dark energy\u0026quot;\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=\"30356011\" href=\"/search?publisher_ids%5B%5D=30356011\"\u003eCurated Video\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'\u003e1. Wide shot of panelists2. SOUNDBITE: (English), Steve Allen, Institute of Astronomy, Cambridge, UK\"Our main news today, is that the universe is really accelerating.  By using the Chandra X-Ray Observatory to study giant galaxy...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003e1. Wide shot of panelists\u003cbr/\u003e2. SOUNDBITE: (English), Steve Allen, Institute of Astronomy, Cambridge, UK\u003cbr/\u003e\"Our main news today, is that the universe is really accelerating.  By using the Chandra X-Ray Observatory to study giant galaxy clusters, we have obtained strong evidence for dark energy, and clear and direct confirmation that the expansion of our universe is accelerating.  Our results, which are completely independent from supernovae studies, and which are bases on very well understood simple physics provide important new clues about the nature of dark energy and show it much behaves like the cosmological constant in Einstein's theory of general relativity.\"\u003cbr/\u003e3. Various NASA animation\u003cbr/\u003e4. SOUNDBITE: (English), Steve Allen, Institute of Astronomy, Cambridge, UK\u003cbr/\u003e\"What we find is that the distances to the clusters are all significantly larger than if there were no dark energy.  And moreover, we find that the distances are growing ever more rapidly as we move towards the present day.  Dark energy is pushing the universe apart and accelerating the expansion.\"\u003cbr/\u003e5. NASA pie chart on dark energy\u003cbr/\u003e6. SOUNDBITE: (English), Andy Fabian, Institute of Astronomy, Cambridge, UK\u003cbr/\u003e\"Now perhaps the best way how we can find what dark energy is to see how it might change in time. And our observations are consistent with the cosmological constant.  By constant, we mean the energy density of dark energy is constant with time.  The data also allow, for the dark energy, the density of dark energy to increase slowly in the future.  It is unlikely it was larger in the past, otherwise, indeed the clusters would not have existed, they would not exist now.\"\u003cbr/\u003e7. Wide shot\u003cbr/\u003e8. SOUNDBITE: (English), Steve Allen, Institute of Astronomy, Cambridge, UK\u003cbr/\u003e\"The most radical of those solutions, which was the big crunch, which you can characterize as some disaster for everything, but it is by no means certain, or anywhere near that disaster is on the cards for us.  As I said, at the moment, the results are consistent with the cosmological constant being a likely model for dark energy, and in that case that disaster would not happen.  It is a long way away.\"\u003cbr/\u003e9. NASA animation, if \"big crunch\" were to occur\u003cbr/\u003eNew data from the US space agency NASA's Chandra X-ray Observatory suggests that the universe's expansion has been picking up speed.\u003cbr/\u003eThe findings, made public at a NASA press conference in Washington on Tuesday, reveal a force known as \"dark energy,\" which experts believe will shape the fate of the universe. \u003cbr/\u003eChandra's probe of dark energy relies on the unique ability of X-ray observations to study the hot gas in galaxy clusters. \u003cbr/\u003eBy utilising Chandra data to figure out the ratio of hot gas to dark matter, astronomers found how far away the clusters were and at what point in time they were viewing them. \u003cbr/\u003eThey observed that the clusters were farther away than expected, pointing to an accelerated expansion. \u003cbr/\u003eScientists have come up with different theories about the future of the universe.\u003cbr/\u003eIn one such theory, the universe would collapse on itself billions of years from now.\u003cbr/\u003eThis is called the \"Big Crunch.\"\u003cbr/\u003eOthers theorize that it will expand so rapidly that everything is torn apart in the \"Big Rip.\"  \u003cbr/\u003eSteve Allen, from the Institute of Astronomy in Cambridge in the United Kingdom argues that it is not likely that the \"Big Crunch\" will occur in the near future, indicating that \"it is a long way away.\"\u003cbr/\u003eAccording to scientists, the expansion of the universe gradually slowed down until about 6 billion years ago, when it started to accelerate.\u003cbr/\u003eAnd scientists speculate that this might have been caused due to the repulsive effect of dark energy.\u003cbr/\u003eAlbert Einstein first proposed the concept of dark energy, calling it a \"cosmological constant\" in his General Theory of Relativity. \u003cbr/\u003eHe suggested that a repulsive force must be counteracting the pull of gravity, leading to a sort of equilibrium to maintain a static universe that doesn't change in size. \u003cbr/\u003eHe later retracted the idea, when Edwin Hubble's observations indicated the universe was expanding.  \u003cbr/\u003eWith the latest findings, it is possible that Einstein's theory might have had much more merit than he thought.\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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