File:Triton's Cryovulcan.jpg
Triton's_Cryovulcan.jpg (424 × 499像素,文件大小:32 KB,MIME类型:image/jpeg)
说明
摘要
[编辑]Original Caption Released with Image: T This false color image of Triton is a composite of images taken through the violet, green and ultraviolet filters. The image was taken early on Aug. 25, 1989 when Voyager 2 was about 190,000 kilometers (118,000 miles) from Triton's surface. The smallest visible features are about 4 kilometers (2.5 miles) across. The image shows a geologic boundary between completely dark materials and patchy light/dark materials. A layer of pinkish material stretches across the center of the image. The pinkish layer must be thin because underlying albedo patterns show through. Several features appear to be affected by the thin atmosphere; the elongated dark streaks may represent particulate materials blown in the same direction by prevailing winds, and the white material may be frost deposits. Other features appear to be volcanic deposits including the smooth, dark materials alongside the long, narrow canyons. The streaks themselves appear to originate from very small circular sources, some of which are white, like the source of the prominent streak near the center of the image. The sources may be small volcanic vents with fumarolic-like activity. The colors may be due to irradiated methane, which is pink to red, and nitrogen, which is white. The Voyager Mission is conducted by JPL for NASA's Office of Space Science and Applications.
Source
[编辑]http://photojournal.jpl.nasa.gov/catalog/PIA02214
许可协议
[编辑]Public domainPublic domainfalsefalse |
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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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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当前 | 2006年9月18日 (一) 18:25 | 424 × 499(32 KB) | Uwe W.(留言 | 贡献) | '''Original Caption Released with Image:''' T This false color image of Triton is a composite of images taken through the violet, green and ultraviolet filters. The image was taken early on Aug. 25, 1989 when Voyager 2 was about 190,000 kilometers (118 |
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