IC 4628：大虾星云
(原标题: IC 4628: The Prawn Nebula)
2023-07-26
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在心宿二的南面，在星云丰富的天蝎座的尾部，坐落着发射星云IC 4628。附近年轻数百万年的热的大质量恒星用不可见的紫外线照射星云，从原子中剥离电子。电子最终与原子重新结合，产生可见的星云光，主要是氢的红色辐射。据估计距离为6000光年，图中显示的区域直径约为250光年，横跨天空中的三个满月。这个星云也被澳大利亚天文学家科林·斯坦利·古姆（Colin Stanley Gum）命名为Gum 56，但热爱海鲜的深空爱好者可能会知道这个宇宙云是虾星云。这张优美的彩色图像是4月份在智利的里约热内卢Hurtado拍摄的一幅新的天文构图。
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South of Antares, in the tail of the nebula-rich constellation Scorpius, lies emission nebula IC 4628. Nearby hot, massive stars, millions of years young, irradiate the nebula with invisible ultraviolet light, stripping electrons from atoms. The electrons eventually recombine with the atoms to produce the visible nebular glow, dominated by the red emission of hydrogen. At an estimated distance of 6,000 light-years, the region shown is about 250 light-years across, spanning over three full moons on the sky. The nebula is also cataloged as Gum 56 for Australian astronomer Colin Stanley Gum, but seafood-loving deep sky-enthusiasts might know this cosmic cloud as the Prawn Nebula. The graceful color image is a new astronomical composition taken over several nights in April from Rio Hurtado, Chile.
© Daniel Stern