File:PIA16139 Puzzling Little Martian Spheres That Don't Taste Like 'Blueberries'.tif
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[编辑]描述PIA16139 Puzzling Little Martian Spheres That Don't Taste Like 'Blueberries'.tif |
English: Small spherical objects fill the field in this mosaic combining four images from the Microscopic Imager on NASA's Mars Exploration Rover Opportunity. The view covers an area about 2.4 inches (6 centimeters) across, at an outcrop called "Kirkwood" in the Cape York segment of the western rim of Endeavour Crater. The individual spherules are up to about one-eighth inch (3 millimeters) in diameter.
The Microscopic Imager took the component images during the 3,064th Martian day, or sol, of Opportunity's work on Mars (Sept. 6, 2012). For a color view of the Kirkwood outcrop as Opportunity was approaching it two weeks earlier, see PIA16128. Opportunity discovered spherules at its landing site more than eight-and-a-half years earlier. Those spherules were nicknamed "blueberries." They provided important evidence about long-ago wet environmental conditions on Mars because researchers using Opportunity's science instruments identified them as concretions rich in the mineral hematite deposited by water saturating the bedrock. A picture of the "blueberries" from the same Microscopic Imager is PIA05564. The spherules at Kirkwood do not have the iron-rich composition of the blueberries. They also differ in concentration, distribution and structure. Some of the spherules in this image have been partially eroded away, revealing concentric internal structure. Opportunity's science team plans to use the rover for further investigation of these spherules to determine what evidence they can provide about ancient Martian environmental conditions. |
日期 | |
来源 | http://photojournal.jpl.nasa.gov/catalog/PIA16139 |
作者 | NASA/JPL-Caltech/Cornell Univ./ USGS/Modesto Junior College |
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本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。) | ![]() |
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图像标题 | converted PNM file |
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宽度 | 1,809 px |
高度 | 1,856 px |
压缩方案 | 未压缩 |
像素构成 | 黑白(黑为0) |
色彩组分数 | 1 |
每带行数 | 4 |
数据排布 | 大块格式 |