分子云[Molecular Cloud] - 达人(其实～我是卧底，来自外星)

2005/06/02 | 分子云[Molecular Cloud]
类别(¤〖天文〗) | 评论(0) | 阅读(41) | 发表于 21:46: A dense cloud containing H₂, He, and many other molecules. Molecular clouds are typically 100- , 10-20 K, size of pc, and have 10-10⁶ molecules cm^-3. The free-fall time for such clouds is y. However, magnetic fields support the cloud and support the collapse, regulating star formation. Molecular clouds with masses in the range 10³- are sometimes called giant molecular clouds.; 0