珠光宝气
转自:[url=http://hubblesite.org/newscenter/archive/releases/2008/25/image/a/]http://hubblesite.org/newscenter ... es/2008/25/image/a/[/url]ABOUT THIS IMAGE:
In studying the dimmest burned-out stars in globular star cluster NGC 6791, NASA's Hubble Space Telescope has uncovered a paradox: three different populations of stars exist in an object where all the stars should have formed at the same time out of an interstellar cloud of gas and dust.
[Left] — This is a ground-based telescopic view of NGC 6791, located 13,300 light-years away in the constellation Lyra. The green inset box shows the view with Hubble's Advanced Camera for Surveys.
[Top right] — The full Hubble Advanced Camera for Surveys field is full of stars estimated to be 8 billion years old. Two background galaxies can be seen at upper left.
[Bottom right] — A blow up of view of a small region of the Advanced Camera for Surveys field reveals very faint white dwarfs. The blue circles identify hotter dwarfs that are 4 billion years old. The red circles identify cooler dwarfs that are 6 billion years old.
[b]Object Name:[/b] NGC 6791
[b]Image Type:[/b] Astronomical/Illustration
Credit: [url=http://www.nasa.gov/][color=#0000ff]NASA[/color][/url], [url=http://www.spacetelescope.org/][color=#0000ff]ESA[/color][/url], Digitized Sky Survey, and L. Bedin ([url=http://www.stsci.edu/][color=#0000ff]STScI[/color][/url])
[attach]135173[/attach]
^_^为方便大家打开观看，就不上大图了。想看大图可以下载，注:分卷压缩，需全部下载方可解压。
[[i] 本帖最后由 寻找拉玛 于 2008-7-12 12:46 编辑 [/i]] 转自:[url=http://hubblesite.org/newscenter ... es/2008/25/image/c/]http://hubblesite.org/newscenter ... es/2008/25/image/c/[/url]
[attach]135174[/attach]
^_^为方便大家打开观看，就不上大图了。想看大图可以下载，注:分卷压缩，需全部下载方可解压。这张大图很精彩哦。
[[i] 本帖最后由 寻找拉玛 于 2008-7-12 12:50 编辑 [/i]] 的确如楼主所言::070821_10.jpg:: ::070821_09.jpg:: 收藏了 ::070821_04.jpg:: 全宇宙宝石交易集市 已经做桌面了，谢啦::070821_14.jpg:: 额,,,太美了....
震撼！
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