[酷图] 两极发光的鸡蛋星云。
The Egg Nebula in Polarized LightCredit: W. Sparks (STScI) & R. Sahai (JPL), Hubble Heritage Team (STScI / AURA), NASA
Explanation: Where is the center of the unusual Egg Nebula? Like a baby chick pecking its way out of an egg, the star in the center of the Egg Nebula is casting away shells of gas and dust as it slowly transforms itself into a white dwarf star. The Egg Nebula is a rapidly evolving pre-planetary nebula spanning about one light year toward the constellation of Cygnus. Thick dust, though, blocks the center star from view, while the dust shells further out reflect light from this star. Light vibrating in the plane defined by each dust grain, the central star, and the observer is preferentially reflected, causing an effect known as polarization. Measuring the orientation of the polarized light for the Egg Nebula gives clues to location of the hidden source. The above image taken by the Advanced Camera for Surveys on the Hubble Space Telescope is false-color coded to highlight the orientation of polarization
http://antwrp.gsfc.nasa.gov/apod/image/0304/egg_hst_big.jpg 不好意思，我得纠正一个翻译错误。
The Egg Nebula is a rapidly evolving pre-planetary nebula spanning about one light year toward the constellation of Cygnus.
这里上面的贵宾翻译错了，是1光年大小的行星状星云，不是1/10光年哦（虽然ACS完全能看清3000光年外1/300光年的细节）。 咋看都不像鸡蛋 哈勃望远镜在服役期间确实拍了许多经典的照片！ 原来是坟。。。我说咋这么眼熟
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