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最近的天文事件让天文爱好者大饱眼福,首先是上周三壮丽的丰收月。几天后,太阳向地球喷射出被称为日冕物质抛射 (CME) 的巨大等离子体气泡。当所谓的太阳丝状物坍塌,将凉爽、稠密的气体倾泻到太阳表面时,就会形成 CME。当在黑暗的天空背景下侧视时,这些丝状物被称为日珥(右图)。当 CME 冲击地球磁层时,它们引发了壮观的极光,尽管接近满月的明亮光线,欧洲和北美的观测者在周日晚上仍然可以看到极光。(昨天凌晨,一个冲击波掠过我们的星球,可能是另一个 CME 的前沿。)小行星爱好者也没有失望。近地小行星 (NEA) 2000 RD53 是美国宇航局近地小行星追踪系统 (NEAT) 上个月刚刚发现的,于周日飞掠地球,距离地球仅为月球距离的 11 倍。借助八英寸或更大的望远镜,观测者仍然可以瞥见这颗明亮的 400 米太空岩石。

Kate Wong is an award-winning science writer and senior editor at 大众科学 focused on evolution, ecology, anthropology, archaeology, paleontology and animal behavior. She is fascinated by human origins, which she has covered for more than 25 years. Recently she has become obsessed with birds. Her reporting has taken her to caves in France and Croatia that Neandertals once called home, to the shores of Kenya's Lake Turkana in search of the oldest stone tools in the world, to Madagascar on an expedition to unearth ancient mammals and dinosaurs, to the icy waters of Antarctica, where humpback whales feast on krill, and on a "Big Day" race around the state of Connecticut to find as many bird species as possible in 24 hours. Kate is co-author, with Donald Johanson, of Lucy's Legacy: The Quest for Human Origins. She holds a bachelor of science degree in biological anthropology and zoology from the University of Michigan. Follow Wong on X (formerly Twitter) @katewong

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