The unprecedented sharpness of Hubble's image has revealed surprising details of the nebula ejection process.
哈勃太空望远镜拍摄到的图片相当清晰,以至于揭示了这一令人惊讶的星云喷射过程。
And it is these that are helping scientists to resolve the outstanding mysteries of the complex shapes and symmetries of planetary nebula.
在图片的“协助”之下,科学家们有望揭开揭开行星状星云复杂的结构,以及其对称性背后的谜团。
MyCn18 was discovered by Annie Jump Cannon and Margaret W Mayall during their research on an extended Henry Draper Catalogue, an astronomical star encyclopedia compiled between 1918 and 1924.
1918年到1924年间,Annie Jump Cannon和Margaret W Mayall在扩充恒星百科全书“亨利-德雷珀目录”的过程中发现了“沙漏星云”MyCn18。
The astronomers described it as a small faint planetary nebula, but the march of technology allowed scientists Raghvendra Sahai and John Trauger of the Jet Propulsion Laboratory to capture this stunning image using Hubble in January 1996.
起初,科学家们将之形容为一小团昏暗的星云,但随着天文研究科学技术的发展,1996年1月时,科学家Raghvendra Sahai和John Trauger利用哈勃望远镜拍摄到这张令人叹为观止的图像。
MyCn18's hourglass shape is thought to have arisen from the expansion of a fast stellar wind within a slowly expanding cloud which is denser near its equator than its poles.
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