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斯皮策望远镜天空壁纸

ssc2006-03b_medium.jpg SIRTF_departure.jpg ssc2008-22a.jpg ssc2009-01b.jpg ssc2007-08c.jpg



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作品信息
作品名:ssc2008-22a.jpg
文件名称:北回归线 / 哈勃望远镜天空壁纸
评分 (26 次投票):00000
关键词:2MASS J09393548-2448279
作品尺寸:739 KiB
加入日期:四月 04, 2009
尺寸:3000 x 2400 像素
显示:388 次
Exif 作品宽度:3000 pixels
Exif 作品高度:2400 pixels
Exif 偏移量:1956
X 分辨率:300
Y 分辨率:300
作品简介:This artist's concept shows the dimmest star-like bodies currently known -- twin brown dwarfs referred to as 2M 0939. The twins, which are about the same size, are drawn as if viewed from one side. Brown dwarfs are neither planets nor stars. They form like stars out of collapsing clouds of gas and dust, but they don't have enough mass to ignite nuclear burning in their cores and become full-blown stars. They are similar to Jupiter in that they are cool balls of gas, but they are warmer and heavier. Astronomers say that the universe is littered with these cosmic misfits, but because they are so dim, they are hard to find. NASA's Spitzer Space Telescope is fitted with heat-seeking infrared eyes, which allow it to detect the minute glow of cool objects like brown dwarfs. Data from Spitzer and the Anglo-Australian Observatory in Australia together reveal that both of the brown dwarfs making up 2M 0939 share the title of dimmest known brown dwarfs. Their atmospheres are also among the coolest known for any brown dwarf (565 to 635 Kelvin or 560 to 680 degrees Fahrenheit). The term "brown dwarf" comes from the fact that these objects change color over time, and therefore do not have a definitive color. The 2M 0939 brown dwarfs, if we could see them directly with out eyes, would glow a very dark magenta color, due to their cool temperatures and the presence of water, methane and ammonia gases in their atmospheres. 2M 0939's full name is 2MASS J09393548-2448279 after the partly NASA-funded infrared mission, the Two Micron All Sky Survey, or "2MASS," which first detected the object in 1999.
分辨率:Inch
定位:1: Normal (0 deg)
软件:Adobe Photoshop CS3 Macintosh
颜色空间:Uncalibrated
IPTC 标题:Not-So-Bright Bulbs
IPTC 版权:http://www.spitzer.caltech.edu/Media/mediaimages/copyright.shtml
IPTC 关键词:2MASS J09393548-2448279
URL:http://album.skylook.org/displayimage.php?pid=5213
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