另眼系列之昴星团

来源:http://gallery.spitzer.caltech.e ... ge_name=ssc2007-07a

The Seven Sisters Pose for Spitzer
The Seven Sisters, also known as the Pleiades star cluster, seem to float on a bed of feathers in a new infrared image from NASA's Spitzer Space Telescope. Clouds of dust sweep around the stars, swaddling them in a cushiony veil.

The Pleiades, located more than 400 light-years away in the Taurus constellation, are the subject of many legends and writings. Greek mythology holds that the flock of stars was transformed into celestial doves by Zeus to save them from a pursuant Orion. The 19th-century poet Alfred Lord Tennyson described them as "glittering like a swarm of fireflies tangled in a silver braid."

The star cluster was born when dinosaurs still roamed the Earth, about 100 million years ago. It is significantly younger than our 5-billion-year-old sun. The brightest members of the cluster, also the highest-mass stars, are known in Greek mythology as two parents, Atlas and Pleione, and their seven daughters, Alcyone, Electra, Maia, Merope, Taygeta, Celaeno and Asterope. There are thousands of additional lower-mass members, including many stars like our sun. Some scientists believe that our sun grew up in a crowded region like the Pleiades, before migrating to its present, more isolated home.

The new infrared image from Spitzer highlights the "tangled silver braid" mentioned in the poem by Tennyson. This spider-web-like network of filaments, colored yellow, green and red in this view, is made up of dust associated with the cloud through which the cluster is traveling. The densest portion of the cloud appears in yellow and red, and the more diffuse outskirts are shown in green hues. One of the parent stars, Atlas, can be seen at the bottom, while six of the sisters are visible at top. Additional stars in the cluster are sprinkled throughout the picture in blue.

The Spitzer data also reveal never-before-seen brown dwarfs, or "failed stars," and disks of planetary debris (not pictured). John Stauffer of NASA's Spitzer Space Telescope mission says Spitzer's infrared vision allows astronomers to better study the cooler, lower-mass stars in the region, which are much fainter when viewed in optical light. Stauffer, who admits to being biased because the Pleiades is his favorite astronomical object, says the cluster is the perfect laboratory for understanding the evolution of stars.

This image is made up of data taken by Spitzer's multiband imaging photometer and its infrared array camera. Light with a wavelength of 4.5 microns is blue; light of 8 microns is green; and light of 24 microns is red.


译文来原:http://www.bjp.org.cn/apod/2007-04/13/content_7519.htm

尘埃星七姐妹

影像提供：NASA, JPL-Caltech, J. Stauffer (SSC, Caltech)

说明：疾驰在距离我们近400光年远的宇宙尘埃中，可爱的昴星团或者说七姐妹星团在天文影像中都是以其壮观的蓝色反射星云而闻名。在可见光波段下，星光被尘埃雕刻并反射，但在这张由斯皮策太空望远镜拍摄的红外影像中，尘埃本身发出了光芒。这张假彩色影像在天空中覆盖大约1度，也就是说在昴星团内横跨7光年，在影像中黄色和红色部分是尘埃中最致密的区域。经过对这片接近年轻星团的探索后，斯皮策收集到的数据显示了其内有许多温度低质量小的恒星，褐矮星或者说是衰败的恒星，可能还有行星状碎片盘。想要在今晚看到昴星团吗？朝金星附近看去，它就位于日落后西方的明亮的昏星旁。（翻译：陈昌）



[ 本帖最后由 寻找拉玛 于 2008-2-17 00:33 编辑 ]

来源:http://gallery.spitzer.caltech.e ... ge_name=ssc2007-07b

Pink Pleiades
The Seven Sisters, also known as the Pleiades star cluster, seem to float on a bed of feathers in a new infrared image from NASA's Spitzer Space Telescope. Clouds of dust sweep around the stars, swaddling them in a cushiony veil.

The Pleiades, located more than 400 light-years away in the Taurus constellation, are the subject of many legends and writings. Greek mythology holds that the flock of stars was transformed into celestial doves by Zeus to save them from a pursuant Orion. The 19th-century poet Alfred Lord Tennyson described them as "glittering like a swarm of fireflies tangled in a silver braid."

The star cluster was born when dinosaurs still roamed the Earth, about 100 million years ago. It is significantly younger than our 5-billion-year-old sun. The brightest members of the cluster, also the highest-mass stars, are known in Greek mythology as two parents, Atlas and Pleione, and their seven daughters, Alcyone, Electra, Maia, Merope, Taygeta, Celaeno and Asterope. There are thousands of additional lower-mass members, including many stars like our sun. Some scientists believe that our sun grew up in a crowded region like the Pleiades, before migrating to its present, more isolated home.

The new infrared image from Spitzer highlights the "tangled silver braid" mentioned in the poem by Tennyson. This spider-web-like network of filaments, colored red in this view, is made up of dust associated with the cloud through which the cluster is traveling. One of the parent stars, Atlas, can be seen at the bottom, while six of the sisters are visible at top. Additional stars in the cluster are sprinkled throughout the picture in blue.

The Spitzer data also reveal never-before-seen brown dwarfs, or "failed stars," and disks of planetary debris (not pictured). John Stauffer of NASA's Spitzer Space Telescope mission says Spitzer's infrared vision allows astronomers to better study the cooler, lower-mass stars in the region, which are much fainter when viewed in optical light. Stauffer, who admits to being biased because the Pleiades is his favorite astronomical object, says the cluster is the perfect laboratory for understanding the evolution of stars.

This image shows infrared light captured by Spitzer's infrared array camera. Light with wavelengths of 8 and 5.8 microns is red and orange; light of 4.5 microns is green; and light of 3.6 microns is blue.

来源:http://gallery.spitzer.caltech.e ... ge_name=ssc2007-07a

http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=ssc2007-07b

^-^为方便大家打开阅读就不贴大图了，如果想看大图可以下载附件。注:分卷压缩，全部下载后才能解压。

[ 本帖最后由 寻找拉玛 于 2008-2-17 00:28 编辑 ]

这云气PS的很过火啊。。。

怎么PS的？                          
                       
                           

昴星团大图，不错，下载了。

好图！！收藏之！！感谢拉玛分享！！！ 支持！！

七姐妹就是漂亮！！！

拉玛的帖子就是赞