File:001221_Cassini_Jupiter_&_Europa_&_Callisto.jpg
維基百科,自由的 encyclopedia
![File:001221 Cassini Jupiter & Europa & Callisto.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/001221_Cassini_Jupiter_%26_Europa_%26_Callisto.jpg/499px-001221_Cassini_Jupiter_%26_Europa_%26_Callisto.jpg)
原始文件 (846 × 1,016像素,文件大小:88 KB,MIME类型:image/jpeg)
摘要
描述001221 Cassini Jupiter & Europa & Callisto.jpg |
(From NASA's Jet Propulsion Laboratory) : "One moment in an ancient, orbital dance is caught in this color picture taken by NASA's Cassini spacecraft on Dec. 7, 2000, just as two of Jupiter's four major moons, Europa and Callisto, were nearly perfectly aligned with each other and the center of the planet. The distances are deceiving. Europa, seen against Jupiter, is 600,000 kilometers (370,000 miles) above the planet's cloud tops. Callisto, at lower left, is nearly three times that distance from the cloud tops. Europa is a bit smaller than Earth's Moon and has one of the brightest surfaces in the solar system. Callisto is 50 percent bigger -- roughly the size of Saturn's largest satellite, Titan -- and three times darker than Europa. Its brightness had to be enhanced in this picture, relative Europa's and Jupiter's, in order for Callisto to be seen in this image. Europa and Callisto have had very different geologic histories but share some surprising similarities, such as surfaces rich in ice. Callisto has apparently not undergone major internal compositional stratification, but Europa's interior has differentiated into a rocky core and an outer layer of nearly pure ice. Callisto's ancient surface is completely covered by large impact craters: The brightest features seen on Callisto in this image were discovered by the Voyager spacecraft in 1979 to be bright craters, like those on our Moon. In contrast, Europa's young surface is covered by a wild tapestry of ridges, chaotic terrain and only a handful of large craters. Recent data from the magnetometer carried by the Galileo spacecraft, which has been in orbit around Jupiter since 1995, indicate the presence of conducting fluid, most likely salty water, inside both worlds. Scientists are eager to discover whether the surface of Saturn's Titan resembles that of Callisto or Europa, or whether it is entirely different when Cassini finally reaches its destination in 2004." |
日期 | |
来源 | NASA https://photojournal.jpl.nasa.gov/catalog/PIA02861 |
作者 | NASA-JPL |
许可协议
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:
|
註解 InfoField | 該圖片含有註解:在維基媒體共享資源上查看註解 |
说明
此文件中描述的项目
描繪內容
21 12 2000
image/jpeg
90,617 字节
1,016 像素
846 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 | 2007年4月20日 (五) 20:27 | ![]() | 846 × 1,016(88 KB) | Odessa3 | == Description == {{Information |Description=Jupiter and two of its satellites, Europa and Callisto, seen by Cassini probe |Source=NASA |Date=2000/12/21 |Author=NASA }} Category:Jupiter (planet) Category:Callisto Category:Europa (moon) [[ |
文件用途
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:
- ar.wikipedia.org上的用途
- azb.wikipedia.org上的用途
- az.wikipedia.org上的用途
- ba.wikipedia.org上的用途
- ca.wikipedia.org上的用途
- ceb.wikipedia.org上的用途
- cs.wikipedia.org上的用途
- cv.wikipedia.org上的用途
- en.wikipedia.org上的用途
- en.wikiversity.org上的用途
- es.wikipedia.org上的用途
- fa.wikipedia.org上的用途
- ga.wikipedia.org上的用途
- he.wikipedia.org上的用途
- hy.wikipedia.org上的用途
- id.wikipedia.org上的用途
- is.wikipedia.org上的用途
- it.wikipedia.org上的用途
- ja.wikipedia.org上的用途
- ko.wikipedia.org上的用途
- mk.wikipedia.org上的用途
- no.wikipedia.org上的用途
- pl.wikipedia.org上的用途
- pt.wikipedia.org上的用途
- ro.wikipedia.org上的用途
- ru.wikipedia.org上的用途
- sk.wikipedia.org上的用途
- ta.wikipedia.org上的用途
- uk.wikipedia.org上的用途
- war.wikipedia.org上的用途
元数据
此文件中包含有扩展的信息。这些信息可能是由数码相机或扫描仪在创建或数字化过程中所添加。
如果此文件的源文件已经被修改,一些信息在修改后的文件中将不能完全反映出来。
图像标题 |
|
---|---|
方向 | 正常 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
使用软件 | Adobe Photoshop 7.0 |
文件修改日期时间 | 2007年4月19日 (四) 17:13 |
色彩空间 | 未标定 |
IIM版本 | 2 |