File:A-Mira-Full down sampled and cropped.jpg - 维基百科,自由的百科全书

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English: Mira A is a red giant variable star in the constellation Cetus. This ultraviolet-wavelength image mosaic, taken by NASA's Galaxy Evolution Explorer, shows a comet-like "tail" stretching 13 Light-years across space. The "tail" consists of hydrogen gas blown off of the star, with the material at the furthest end of the "tail" having been emitted about 30,000 years ago. The tail-like configuration of the emitted material appears to result from Mira's uncommonly high speed relative to the Milky Way galaxy's ambient gas-- about 130 kilometers per second.Mira itself is seen as a small white dot inside a blue bulb. You could also see many stars and galaxies at the image.
来源 http://www.galex.caltech.edu/media/glx2007-04r_img01.html
作者 NASA
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Mira.jpg
Mira-uv-bow-shock-tail-vertical.jpg

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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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当前2010年3月21日 (日) 04:402010年3月21日 (日) 04:40版本的缩略图2,500 × 625(1.31 MB)Ohms Law Bot{{BotMoveToCommons|1=en.wikipedia|day=21|month=March|year=2010}} == Summary == :Mira A is a red giant variable star in the constellation Cetus. This ultraviolet-wavelength image mosaic, taken by NASA's Galaxy Evolution Explorer, s

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