蒸發氣體球

蒸發氣體球或EGG是位於外太空的氫氣區，大小約為100天文單位，這些氫氣為其籠罩的氣體遮蔽了電離紫外線。被蒸發氣體球保護著的氣體濃稠區域有利於恆星的誕生。

參考資料
外部連結

• [https://spacetelescope.org/images/opo0822a/ Hubble sees stars and a stripe in celestial fireworks] — ESA/NASA Image, July 1, 2008
• [http://hubblesite.org/newscenter/archive/releases/1995/44/text/ Embryonic Stars Emerge from Interstellar "Eggs"] , HubbleSite, Nov. 2, 1995

*http://hubblesite.org/newscenter/archive/releases/1995/44/text/ Hubble site
*http://apod.nasa.gov/apod/image/1207/pillars6_hst_1518.jpg NASA APODly 2012
*http://www.msnbc.msn.com/id/17467408/ns/technology_and_science-space/t/suns-baby-twin-spotted-pillars-creation/#.UA0slGGe5uoNBCNews Space, 3/5/2007