36 年在轨观测:哈勃望远镜新图聚焦三叶星云,距地球约 5200 光年
IT之家 4 月 28 日消息,美国宇航局为庆祝哈勃太空望远镜升空 36 周年(1990 年 4 月 24 日升空), 发布了三叶星云(M20/NGC6514)新图像。 IT之家注:三叶星云距离地球约 5200 光年,它的形状就好像是三片发亮的树叶紧密而和谐地凑在一起,因此被称作
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