2017年02月15日:哈伯太空望远镜拍摄的葫芦星云-(The Calabash Nebula from Hubble)

2017年02月15日:哈伯太空望远镜拍摄的葫芦星云-(The Calabash Nebula from Hubble)

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2017-02-15 / 0 评论 / 0 阅读 / 正在检测是否收录...

2017年02月15日:哈伯太空望远镜拍摄的葫芦星云-(The Calabash Nebula from Hubble)
2017年02月15日:哈伯太空望远镜拍摄的葫芦星云-(The Calabash Nebula from Hubble)--原图下载


Image Credit: NASA,ESA,Hubble, MAST; Acknowledgement: Judy Schmidt
说明: 快速扩张的气体云,标示了葫芦星云内的中心星之末日已来临。这颗曾经正常的恒星已用尽了核燃料,造成中心区收缩成为白矮星。在此过程中所释放出的部分能量,导至了这颗恒星的外层气壳发生膨胀,从而形成美丽的原行星状星云。随着气体以每小时将近100万公里的速度冲撞周围的星际气体,在所形成的超音速激波波前发生了电离则发出泛蓝辉光。不过,滨死的中心星在厚重气体和尘埃的遮掩下隐不可见。又名为臭蛋星云和OH231.8+4.2的葫芦星云,在接下来的1,000年之中,可能会发展成完整的双极行星状星云上面影像所呈现的此星云,大小约为1.4光年,座落在南天船尾座方向约5,000光年远之处。

原文:

Image Credit: NASA,ESA,Hubble, MAST; Acknowledgement: Judy Schmidt
Explanation: Fast expanding gas clouds mark the end for a central star in the Calabash Nebula. The once-normal star has run out of nuclear fuel, causing the central regions to contract into a white dwarf. Some of the liberated energy causes the outer envelope of the star to expand. In this case, the result is a photogenic proto-planetary nebula. As the million-kilometer per hour gas rams into the surrounding interstellar gas, a supersonic shock front forms where ionized hydrogen and nitrogen glow blue. Thick gas and dust hide the dying central star. The Calabash Nebula, also known as the Rotten Egg Nebula and OH231.8+4.2, will likely develop into a full bipolar planetary nebula over the next 1000 years. The nebula, featured here, is about 1.4 light-years in extent and located about 5000 light-years away toward the constellation of Puppis.

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