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File:Embryonic Stars in the Trifid Nebula.jpg

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描述
English: This image composite compares visible-light views with an infrared view from NASA's Spitzer Space Telescope of the glowing Trifid Nebula, a giant star-forming cloud of gas and dust located 5,400 light-years away in the constellation Sagittarius.

Visible-light images of the Trifid taken with NASA's Hubble Space Telescope, Baltimore, Md. (inside left) and the National Optical Astronomy Observatory, Tucson, Ariz., (outside left) show a murky cloud lined with dark trails of dust. Data of this same region from the Institute for Radioastronomy millimeter telescope in Spain revealed four dense knots, or cores, of dust (outlined by yellow circles), which are "incubators" for embryonic stars. Astronomers thought these cores were not yet ripe for stars, until Spitzer spotted the warmth of rapidly growing massive embryos tucked inside.

These embryos are indicated with arrows in the false-color Spitzer picture (right), taken by the telescope's infrared array camera. The same embryos cannot be seen in the visible-light pictures (left). Spitzer found clusters of embryos in two of the cores and only single embryos in the other two. This is one of the first times that multiple embryos have been observed in individual cores at this early stage of stellar development.
日期
来源 http://www.spitzer.caltech.edu/images/1376-ssc2005-02b-Stellar-Incubators-Seen-Cooking-up-Stars
作者 NASA/JPL-Caltech/J. Rho (SSC/Caltech)

Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy

Individual images

see http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=ssc2005-02b archive copy at the Wayback Machine High quality tif files also avaliable.

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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。)
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