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CRL 2688 (Egg Nebula)


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CRL 2688
Egg Nebula (卵星雲)
Planetary Nebula (惑星状星雲)
Protoplanetary Nebula (原始惑星状星雲)
Nb PN


別名 (Other names)
RAFGL 2688, The Egg, Cygnus Egg

距離 (Distance)
3,000光年 (3,000 light-years)

星座 (Constellation)
はくちょう座 (Cyg) (Cygnus)

Egg Nebula (CRL 2688) is a planetary nebula located 3,000 light years from the Earth in the constellation Cygnus.

CRL 2688 (Egg Nebula) : Picture

CRL2688 (Egg Nebula)
CRL 2688 (Egg Nebula)
(C) NASA
Where is the center of the 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 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 as 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.

CRL2688 (Egg Nebula) CRL2688 (Egg Nebula)
CRL 2688 (Egg Nebula)
(C) NASA
CRL 2688 (Egg Nebula)
(C) NASA
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