File:Alpha Centauri AB over limb of Saturn PIA10406.jpg

原始文件 (1,017 × 477像素,文件大小:84 KB,MIME类型:image/jpeg


摘要

描述
English: Original Caption Released with Image:

The nearest star system, the trinary star Alpha Centauri, hangs above the horizon of Saturn. Both Alpha Centauri A and B—stars very similar to our own—are clearly distinguishable in this image. (The third star in the Alpha Centauri system, the red dwarf Proxima Centauri, is not visible here.) From the orbit of Saturn, light (as well as Cassini's radio signal) takes a little more than an hour travel to Earth. The distance to Alpha Centauri is so great that light from these stars takes more than four years to reach our Solar System. Thus, although Saturn seems a distant frontier, the nearest star is almost 30,000 times farther away. This image is part of a stellar occultation sequence, during which Cassini watches as a star (or stars) as it passes behind Saturn. Light from the stars is attenuated by the uppermost reaches of Saturn's gaseous envelope, revealing information about the structure and composition of the planet's atmosphere. The view was captured from about 66 degrees above the ringplane and faces southward on Saturn. Ring shadows mask the planet's northern latitudes at bottom.

The image was taken in visible red light with the Cassini spacecraft narrow-angle camera on May 17, 2008. The view was obtained at a distance of approximately 534,000 kilometers (332,000 miles) from Saturn. Image scale on Saturn is about 3 kilometers (2 miles) per pixel.
日期
来源

http://photojournal.jpl.nasa.gov/catalog/PIA10406

作者 NASA/JPL/Space Science Institute
本图像或视频收录于美国国家航空航天局 (NASA)喷气推进实验室(Jet Propulsion Laboratory),其照片编号是: PIA10406

此标签不表示文件的著作权状态。任何文件在附有此标签的同時还需要一个有效的著作权标签请参阅许可协议说明页面以了解更多信息。
其他语言:

许可协议

Public domain 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/zhNASA版权方针页面JPL图片使用方针。)
警告:

原始上传日志

原始描述頁面位於這裡。下列使用者名稱均來自en.wikipedia。
  • 2008-06-20 12:31 Kwamikagami 1017×477×8 (17057 bytes) {{Information |Description= Original Caption Released with Image: The nearest star system, the trinary star Alpha Centauri, hangs above the horizon of Saturn. Both Alpha Centauri A and B—stars very similar to our own—are clearly distinguishable in th

说明

添加一行文字以描述该文件所表现的内容

此文件中描述的项目

描繪內容

image/jpeg

d20b02f9de6c46ceff273a13ffc68237ed54a27a

85,841 字节

477 像素

1,017 像素

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2019年4月26日 (五) 14:202019年4月26日 (五) 14:20版本的缩略图1,017 × 477(84 KB)FriedrichKiefererBetter quality.
2008年6月20日 (五) 16:092008年6月20日 (五) 16:09版本的缩略图1,017 × 477(17 KB)FrancescoA{{Information |Description={{en|Original Caption Released with Image: The nearest star system, the trinary star Alpha Centauri, hangs above the horizon of Saturn. Both Alpha Centauri A and B—stars very similar to our own—are clearly distinguishable in

以下页面使用本文件:

全域文件用途

以下其他wiki使用此文件: