深场：大麦哲伦星云
(原标题: Deep Field: The Large Magellanic Cloud)
2023-03-07
浏览次数: 15
这是螺旋星系吗？否。实际上，它是大麦哲伦星云（LMC），我们银河系最大的卫星星系。LMC被归类为矮不规则星系，因为它通常是混沌的。然而，在这个深而广的曝光中，LMC的全部范围变得可见。令人惊讶的是，在长时间的曝光中，LMC开始像一个棒旋星系。大麦哲伦星云距离海豚座（多拉多）只有18万光年远。LMC跨度约15000光年，是SN1987A的所在地，SN1987A是现代最亮、最近的超新星。与小麦哲伦云（SMC）一起，小麦哲伦云可以在地球的南半球用肉眼看到。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
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Is this a spiral galaxy? No. Actually, it is the Large Magellanic Cloud (LMC), the largest satellite galaxy of our own Milky Way Galaxy. The LMC is classified as a dwarf irregular galaxy because of its normally chaotic appearance. In this deep and wide exposure, however, the full extent of the LMC becomes visible. Surprisingly, during longer exposures, the LMC begins to resemble a barred spiral galaxy. The Large Magellanic Cloud lies only about 180,000 light-years distant towards the constellation of the Dolphinfish (Dorado). Spanning about 15,000 light-years, the LMC was the site of SN1987A, the brightest and closest supernova in modern times. Together with the Small Magellanic Cloud (SMC), the LMC can be seen in Earth's southern hemisphere with the unaided eye. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN)