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File:A Horseshoe Einstein Ring from Hubble.JPG

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English: What's large and blue and can wrap itself around an entire galaxy? A gravitational lens mirage. Pictured above, the gravity of a luminous red galaxy (LRG) has gravitationally distorted the light from a much more distant blue galaxy. More typically, such light bending results in two discernible images of the distant galaxy, but here the lens alignment is so precise that the background galaxy is distorted into a horseshoe -- a nearly complete ring. Since such a lensing effect was generally predicted in some detail by Albert Einstein over 70 years ago, rings like this are now known as Einstein Rings. Although LRG 3-757 was discovered in 2007 in data from the Sloan Digital Sky Survey (SDSS), the image shown above is a follow-up observation taken with the Hubble Space Telescope's Wide Field Camera 3. Strong gravitational lenses like LRG 3-757 are more than oddities -- their multiple properties allow astronomers to determine the mass and dark matter content of the foreground galaxy lenses. (citation from APOD)
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这是一张修改过的图片,这意味着它已在原版本的基础上通过软件进行了编辑,改动内容:Cropped。其原始版本为:Lensshoe hubble.jpg。修改者:Bulwersator

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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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  • File:Lensshoe_hubble.jpg licensed with PD-USGov-NASA
    • 2011-12-21T11:34:12Z Bulwersator 3235x2572 (5228638 Bytes) {{Information |Description ={{en|1=What's large and blue and can wrap itself around an entire galaxy? A gravitational lens mirage. Pictured above, the gravity of a luminous red galaxy (LRG) has gravitationally distorted th

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Image of LRG 3-757, an example of a galaxy's light distorted by gravitational lensing

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当前2011年12月21日 (三) 11:352011年12月21日 (三) 11:35版本的缩略图1,014 × 670(109 KB)Bulwersator== {{int:filedesc}} == {{Information |Description={{en|1=What's large and blue and can wrap itself around an entire galaxy? A gravitational lens mirage. Pictured above, the gravity of a luminous red galaxy (LRG) has gravitationally distorted the light fro

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