File:PIA18310-SaturnMoon-Rhea-20150210.jpg
![File:PIA18310-SaturnMoon-Rhea-20150210.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/PIA18310-SaturnMoon-Rhea-20150210.jpg/600px-PIA18310-SaturnMoon-Rhea-20150210.jpg?20150421110927)
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[編輯]描述PIA18310-SaturnMoon-Rhea-20150210.jpg |
English: PIA18310: Rhea in Relief
http://photojournal.jpl.nasa.gov/catalog/PIA18310 Surface features on Rhea -- mostly impact craters in this image -- are thrown into sharp relief thanks to long shadows. Viewing this terrain near the day/night terminator makes it easier to appreciate just how violent Rhea's geological history has been. The craters on Rhea (949 miles, or 1,527 kilometers across) are the result of 4.6 billion years of bombardment by small bodies. With very little erosion, the scars and craters remain unless they are overwritten by other, newer impacts. This view looks toward the anti-Saturn hemisphere of Rhea. North on Rhea is up and rotated 11 degrees to the right. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 10, 2015. The view was acquired at a distance of approximately 47,000 miles (76,000 kilometers) from Rhea. Image scale is 1,500 feet (460 meters) per pixel. The Cassini mission is a cooperative project of NASA, ESA (the European Space Agency) and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colorado. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini. The Cassini imaging team homepage is at http://ciclops.org. |
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來源 | http://photojournal.jpl.nasa.gov/jpeg/PIA18310.jpg |
作者 | NASA/JPL-Caltech/Space Science Institute |
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[編輯]Public domainPublic domainfalsefalse |
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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 | 2015年4月21日 (二) 11:09 | ![]() | 1,020 × 1,020(207 KB) | Drbogdan(對話 | 貢獻) | User created page with UploadWizard |
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