File:PIA18822-LunarGrailMission-OceanusProcellarum-Rifts-Overall-20141001.jpg
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摘要[編輯]
描述PIA18822-LunarGrailMission-OceanusProcellarum-Rifts-Overall-20141001.jpg |
English: PIA18822: Gravity Gradients Frame Oceanus Procellarum
October 1, 2014 http://photojournal.jpl.nasa.gov/catalog/PIA18822 Topography of Earth's moon generated from data collected by the Lunar Orbiter Laser Altimeter, aboard NASA's Lunar Reconnaissance Orbiter, with the gravity anomalies bordering the Procellarum region superimposed in blue. The border structures are shown using gravity gradients calculated with data from NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission. These gravity anomalies are interpreted as ancient lava-flooded rift zones buried beneath the volcanic plains (or maria) on the nearside of the Moon. Launched as GRAIL A and GRAIL B in September 2011, the probes, renamed Ebb and Flow, operated in a nearly circular orbit near the poles of the moon at an altitude of about 34 miles (55 kilometers) until their mission ended in December 2012. The distance between the twin probes changed slightly as they flew over areas of greater and lesser gravity caused by visible features, such as mountains and craters, and by masses hidden beneath the lunar surface. The twin spacecraft flew in a nearly circular orbit until the end of the mission on Dec. 17, 2012, when the probes intentionally were sent into the moon's surface. NASA later named the impact site in honor of late astronaut Sally K. Ride, who was America's first woman in space and a member of the GRAIL mission team. GRAIL's prime and extended science missions generated the highest-resolution gravity field map of any celestial body. The map will provide a better understanding of how Earth and other rocky planets in the solar system formed and evolved. The GRAIL mission was managed by NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, for NASA's Science Mission Directorate in Washington. The mission was part of the Discovery Program managed at NASA's Marshall Space Flight Center in Huntsville, Alabama. GRAIL was built by Lockheed Martin Space Systems in Denver. For more information about GRAIL, please visit http://grail.nasa.gov. |
日期 | |
來源 | http://photojournal.jpl.nasa.gov/jpeg/PIA18822.jpg |
作者 | NASA/Colorado School of Mines/MIT/GSFC/Scientific Visualization Studio |
授權條款[編輯]
Public domainPublic domainfalsefalse |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
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目前 | 2014年10月5日 (日) 02:30 | 1,500 × 1,500(199 KB) | Drbogdan(對話 | 貢獻) | User created page with UploadWizard |
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