File:Hubble Globes of Mars.jpg
原始文件 (2,675 × 1,541像素,文件大小:211 KB,MIME类型:image/jpeg)
说明
摘要
[编辑]描述Hubble Globes of Mars.jpg |
English: Pictures of the planet Mars taken with the recently refurbished NASA Hubble Space Telescope (HST) will provide the most detailed global view of the red planet ever obtained from Earth.
The images were taken by HST's Wide Field Planetary Camera-2 on March 10, 1997, just before Mars opposition, when the red planet made one of its closest to the Earth (about 60 million miles or 100 million km). These pictures were taken during three HST orbits that were separated by about six hours. This timing was chosen so that Mars, with its 24-hour 39-minute day, would rotate about 90 degrees between orbits. This imaging sequence therefore covers most of the Martian surface. These observations will be combined with others planned for March 30 to provide complete coverage. During each orbit, Mars was observed in nine different colors spanning the ultraviolet to the near infrared. The specific colors were chosen to clearly discriminate between airborne dust, ice clouds, and prominent Martian surface features. The color picture shown here was created by combining images taken in blue (433 nm), green (554 nm), and red (763 nm) colored filters. The Martian north pole is at the top (near the center of the bright polar cap) and East is to the right. The center of the disk is at about 23 degrees north latitude, and the central longitudes are near 160, 210, and 305 degrees. These images show the planet on the last day of Martian spring in the northern hemisphere (just before summer solstice). The annual north polar carbon dioxide frost (dry ice) cap is rapidly sublimating, revealing the much smaller permanent water ice cap. This polar cap remnant, along with a few nearby detached regions of surface frost are most obvious in pictures taken through ultraviolet, blue, and green filters. These filters also show numerous bright water ice clouds. The brightest clouds are in the vicinity of the giant volcanos on the Tharsis Plateau (to right of center on left image), and in the giant impact basin, Hellas (near bottom of right-hand image), but a diffuse haze covers much of the Martian tropics as well. The familiar bright and dark markings on the Martian surface are most obvious in images taken through red and near-infrared filters. These images clearly reveal the large, dark, circular "sea" of sand dunes (Olympia Planitia) that surrounds the north pole, as well a number of other familiar features, including the giant Tharsis volcanos. The 16-mile (27 km) high Olympus Mons is near the center of the left-hand image, with Arsia, Povonis, and Ascraeus Mons forming a south-west to north-east line just to its right. The volcano, Elysium Mons is near the center of the middle image. The prominent dark feature just below the center on the disk on the rightmost image is Syrtis Major Planitia. Hubble is being used to monitor dust storm activity to support the Mars Pathfinder and Mars Global Surveyor Orbiter Missions, which are currently en route to Mars. Airborne dust is most easily seen in WFPC2's red and near-infrared images. Weather reports derived from these observations are particularly valuable for Mars Pathfinder, which is scheduled for a July 4, 1997 landing on the red planet. A preliminary analysis of these HST data reveals enhanced dust activity over the dark Vastitas Borealis region in the northern hemisphere, and over the Noachis Terra and Terra Tyrrhena regions just south of the Martian equator. There is also evidence for airborne dust and ice clouds in the Hellas basin. However, these images show no evidence for large-scale dust storm activity. |
日期 | |
来源 |
http://nssdc.gsfc.nasa.gov/image/planetary/mars/hst_mars_opp_9709b.jpg http://nssdc.gsfc.nasa.gov/image/hi-res/planetary/mars/hst_mars_opp_9709b.tiff |
作者 | David Crisp and the WFPC2 Science Team (Jet Propulsion Laboratory/California Institute of Technology) |
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。) | ||
警告:
|
Public domainPublic domainfalsefalse |
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2016年3月19日 (六) 06:58 | 2,675 × 1,541(211 KB) | PlanetUser(留言 | 贡献) | modified from original source | |
2015年2月13日 (五) 06:34 | 2,578 × 1,443(738 KB) | Jcpag2012(留言 | 贡献) | better tint | ||
2015年2月8日 (日) 23:20 | 2,577 × 1,468(751 KB) | Jcpag2012(留言 | 贡献) | more brightness | ||
2015年2月7日 (六) 11:11 | 1,350 × 782(59 KB) | Jcpag2012(留言 | 贡献) | User created page with UploadWizard |
您不可以覆盖此文件。
文件用途
全域文件用途
以下其他wiki使用此文件:
- ar.wikipedia.org上的用途
- bn.wikipedia.org上的用途
- bs.wikipedia.org上的用途
- en.wikipedia.org上的用途
- sr.wikipedia.org上的用途
- ta.wikipedia.org上的用途
- th.wikipedia.org上的用途
- zh.wikipedia.org上的用途
元数据
此文件含有额外信息,这些信息可能是创建或数字化该文件时使用的数码相机或扫描仪所添加的。如果文件已从其原始状态修改,某些详细信息可能无法完全反映修改后的文件。
宽度 | 2,701 px |
---|---|
高度 | 1,565 px |
每色彩组分位数 |
|
压缩方案 | 未压缩 |
像素构成 | RGB |
图像数据位置 | 626 |
色彩组分数 | 3 |
每带行数 | 1,565 |
每压缩带字节数 | 12,681,195 |
数据排布 | 大块格式 |