M1-67 : 無料・フリー素材/写真
M1-67 / NASA Hubble
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Resembling an aerial fireworks explosion, this dramatic Hubble Space Telescope picture of the energetic star WR124 reveals it is surrounded by hot clumps of gas being ejected into space at speeds of over 100,000 miles per hour.Also remarkable are vast arcs of glowing gas around the star, which are resolved into filamentary, chaotic substructures, yet with no overall global shell structure. Though the existence of clumps in the winds of hot stars have been deduced through spectroscopic observations of their inner winds, Hubble resolves them directly in the nebula M1-67 around WR124 as 100-billion-mile-wide glowing gas blobs. Each blob is about 30 times the mass of Earth.The massive, hot central star is known as a Wolf-Rayet star. This extremely rare and short-lived class of super-hot star (in this case 50,000 Kelvin) is going through a violent, transitional phase characterized by the fierce ejection of mass. The blobs may result from the furious stellar wind that does not flow smoothly into space but has instabilities that make it clumpy.The surrounding nebula is estimated to be no older than 10,000 years, which means that it is so young it has not yet slammed into the gases comprising the surrounding interstellar medium.As the blobs cool they will eventually dissipate into space and so don't pose any threat to neighboring stars.The star is 15,000 light-years away, located in the constellation Sagittarius. The picture was taken with Hubble's Wide Field and Planetary Camera 2 in March 1997. For more information please visit: hubblesite.org/image/727/news_release/1998-38Credit: NASA, Yves Grosdidier (University of Montreal and Observatoire de Strasbourg), Anthony Moffat (Universitie de Montreal), Gilles Joncas (Universite Laval), and Agnes Acker (Observatoire de Strasbourg)Find us on Twitter, Instagram, Facebook and YouTube |
| 撮影日 | 2017-11-17 08:46:55 |
| 撮影者 | NASA Hubble |
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