37集群
(原标题: The 37 Cluster)
2024-05-14
浏览次数: 17
对于地球上大多数无害的居民来说，疏散星团NGC 2169中较亮的恒星似乎形成了一个宇宙37。你以为是42吗？从我们的角度来看，这个不可能的数字星群完全是偶然出现的。它距离猎户座约3300光年。就星系或疏散星团而言，NGC 2169是一个很小的星团，跨度约为7光年。NGC 2169的恒星是在同一时间由同一尘埃云和气体云形成的，它们的年龄只有1100万年左右。这样的星团预计会随着时间的推移而分散，因为它们会遇到其他恒星、星际云，并在搭便车穿越星系时经历引力潮。40多亿年前，我们的太阳很可能是在一个类似的疏散星团中形成的。画廊：来自太阳活动区3664的地球极光
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For the mostly harmless denizens of planet Earth, the brighter stars of open cluster NGC 2169 seem to form a cosmic 37. Did you expect 42? From our perspective, the improbable numerical asterism appears solely by chance. It lies at an estimated distance of 3,300 light-years toward the constellation Orion. As far as galactic or open star clusters go, NGC 2169 is a small one, spanning about 7 light-years. Formed at the same time from the same cloud of dust and gas, the stars of NGC 2169 are only about 11 million years old. Such clusters are expected to disperse over time as they encounter other stars, interstellar clouds, and experience gravitational tides while hitchhiking through the galaxy. Over four billion years ago, our own Sun was likely formed in a similar open cluster of stars. Gallery: Earth Aurora from Solar Active Region 3664
© Sergio Eguivar