"I often get asked how astronomers weigh stars," David Kipping of the Harvard-Smithsonian Center for Astrophysics said in a statement.
“我经常被问到如何天文学家称明星，”大卫的天体物理哈佛大学史密森中心的基平在声明中说。
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How much does the water in a cumulus cloud weigh? Peggy LeMone, senior scientist at the National Center for Atmospheric Research in Boulder, Colorado, did the Numbers.