{"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='Twin NASA spacecraft slam into lunar mountain' data-url='/boclips/videos/5c54bc20d8eafeecae12a515' data-video-url='/boclips/videos/5c54bc20d8eafeecae12a515' 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\nTwin NASA spacecraft slam into lunar mountain\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. NASA animation of Ebb and Flow, or the Gravity Recovery and Interior Laboratory (GRAIL), travelling above the surface of the moon2. NASA animation of GRAIL orbiting the moon on its final orbit before crash landing3. NASA animation of...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003e1. NASA animation of Ebb and Flow, or the Gravity Recovery and Interior Laboratory (GRAIL), travelling above the surface of the moon\u003cbr/\u003e2. NASA animation of GRAIL orbiting the moon on its final orbit before crash landing\u003cbr/\u003e3. NASA animation of Ebb and Flow disappearing into moon's surface\u003cbr/\u003ePasadena, California - 17 December 2012\u003cbr/\u003e4. SOUNDBITE: (English) David Lehman, GRAIL Project Manager:\u003cbr/\u003e\"It is dark right now on the moon, but we picked the site to make sure we did not hit the historic sites, the heritage historic sites, and we wanted to get good tracking date before we impacted. So, it turns out that this mountain 75 degree north latitude is where it fell out that we were going to hit.\"\u003cbr/\u003e5. Recent computer image of Ebb and Flow as seen from Earth, a blue and red line indicating their travel paths\u003cbr/\u003e6. NASA animation showing Ebb and Flow orbiting the moon and communicating with the Earth\u003cbr/\u003ePasadena, California - 17 December 2012\u003cbr/\u003e7. SOUNDBITE: (English) Maria Zuber, GRAIL Principal Investigator:\u003cbr/\u003e\"We've determined the thickness of the lunar crust. Finally we have a crustal thickness model of the moon globally that matches the point measurements that have come from Apollo seismics, and this shows us that the moon's crust is actually much thinner than we thought before.\"\u003cbr/\u003eLunar surface - Date unknown\u003cbr/\u003e8. Black and white footage of moon's outer crust as taken by cameras on Ebb and Flow \u003cbr/\u003eA pair of NASA spacecraft were deliberately crashed into a mountain near the moon's north pole on Monday, ending a mission that peered into the lunar interior.\u003cbr/\u003eEngineers commanded the twin spacecraft, Ebb and Flow, to fire their engines and burn their remaining fuel.  \u003cbr/\u003eEbb plunged first followed by Flow about 30 seconds later. \u003cbr/\u003eAfterward, NASA said it had dedicated the impact site in honour of mission team member, Sally Ride, the first American woman in space who died earlier this year.\u003cbr/\u003eBy design, the spot was far away from the Apollo landings and other historical sites. \u003cbr/\u003eWith their fuel tanks almost on empty, NASA devised a controlled crash to avoid contacting any of the treasured sites. \u003cbr/\u003eSince the crash occurred in the dark, it was not visible from Earth. \u003cbr/\u003eThe Lunar Reconnaissance Orbiter circling the moon will pass over the mountain and attempt to photograph the skid marks left by the washing machine sized-spacecraft as they hit the surface at 3,800 miles per hour (6,115 kilometres per hour).\u003cbr/\u003eAfter rocketing off the launch pad in September 2011, Ebb and Flow took a roundabout journey to the moon, arriving over the New Year's holiday on a gravity-mapping mission. \u003cbr/\u003eMore than 100 missions have been flung to Earth's nearest neighbour since the dawn of the Space Age including NASA's six Apollo moon landings that put 12 astronauts on the surface.\u003cbr/\u003eEbb and Flow focused exclusively on measuring the moon's lumpy gravity field in a bid to learn more about its interior and early history. \u003cbr/\u003eAfter flying in formation for months, they produced the most detailed gravity maps of any body in the solar system.\u003cbr/\u003eSecrets long held by the moon are spilling out. \u003cbr/\u003eEbb and Flow discovered that the lunar crust is much thinner than scientists had imagined. \u003cbr/\u003eAnd it was severely battered by asteroids and comets in the early years of the solar system, more than previously realised.\u003cbr/\u003eData so far also appeared to quash the theory that Earth once had two moons that collided and melded into the one we see today.\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 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