File:PIA18388-MarsCuriosityRover-NovaRock-ChemCam-20140712.jpg
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摘要
描述PIA18388-MarsCuriosityRover-NovaRock-ChemCam-20140712.jpg |
English: 07.16.2014
Curiosity's ChemCam Examines Mars Rock Target 'Nova' http://mars.jpl.nasa.gov/msl/multimedia/images/?ImageID=6443 A Martian target rock called "Nova," shown here, displayed an increasing concentration of aluminum as a series of laser shots from NASA's Curiosity Mars rover penetrated through dust on the rock's surface. This pattern is typical of many rocks examined with the rover's laser-firing Chemistry and Camera (ChemCam) instrument. In the first two years since Curiosity landed in Mars' Gale Crater in August 2012, researchers have used ChemCam's laser and spectrometers to examine more than 600 rock or soil targets. The process, called laser-induced breakdown spectroscopy, hits a target with pulses from a laser to generate sparks, whose spectra provide information about which chemical elements are in the target. Multiple laser shots are fired in sequence, each blasting away a thin layer of material so that the following shot examines a slightly deeper layer. The photograph at left is from ChemCam's Remote Micro-Imager camera, taken during the 687th Martian day, or sol, of Curiosity's work on Mars (July 12, 2014). It shows a portion of the surface of Nova about 1.6 inches (4 centimeters) wide, centered at the spot where laser shots hit the baseball-size rock that same sol. The graph at right show the brightness of the resulting spark at a range of wavelengths detected from each of the first 10 laser shots out of 100 total shots fired at the same point on the rock. The initial shots generated less brightness at a wavelength that is diagnostic for aluminum content, compared to shots after the dust coating on the rock had been cleared away by those first few shots. ChemCam's laser zapping of this rock was the first ever during which Curiosity's arm-mounted Mars Hand Lens Imager (MAHLI) camera took images that caught the spark generated by a laser hitting a rock on Mars (see PIA18401). ChemCam is one of 10 instruments in Curiosity's science payload. The U.S. Department of Energy's Los Alamos National Laboratory, in Los Alamos, New Mexico, developed ChemCam in partnership with scientists and engineers funded by the French national space agency (CNES), the University of Toulouse and the French national research agency (CNRS). More information about ChemCam is available at http://www.msl-chemcam.com |
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來源 | http://mars.jpl.nasa.gov/msl/images/PIA18388_ChemCam-Nova-full.jpg |
作者 | NASA/JPL-Caltech/LANL/CNES/IRAP/LPGNantes/CNRS/IAS |
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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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15 7 2014
資料大小 Chinese (Hong Kong) (已轉換拼寫)
335,055 位元組
1,060 像素
1,590 像素
多媒體型式 繁體中文 (已轉換拼寫)
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目前 | 2014年8月7日 (四) 12:23 | 1,590 × 1,060(327 KB) | Drbogdan | User created page with UploadWizard |
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使用軟體 | Adobe Photoshop CS6 (Windows) |
檔案修改日期時間 | 2014年7月15日 (二) 20:30 |
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數位化的日期時間 | 2014年7月15日 (二) 22:30 |
詮釋資料最後修改日期 | 2014年7月15日 (二) 22:30 |
原始文件唯一識別碼 | xmp.did:BBFBE7304B0CE4119877B25C00DECEFF |