ngc7331中的超新星2025rbs
(原标题: Supernova 2025rbs in NGC 7331)
2025-07-31
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很久以前，在五千万光年外的一个星系里，一颗恒星爆炸了。7月14日，地球上的望远镜首次探测到这颗超新星发出的光，天文学家现在将这颗星系外的瞬变恒星命名为超新星2025rbs。2025rbs是目前地球天空中最亮的超新星，是一颗Ia型超新星，可能是由一颗白矮星的热核爆炸引起的，这颗白矮星从双星系统的伴星中吸积了物质。Ia型超新星被用作建立宇宙距离尺度的标准蜡烛。2025rbs的宿主星系是ngc7331。ngc7331本身是飞马座北部的一个明亮的螺旋星系，经常被吹捧为与我们的银河系类似。
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A long time ago in a galaxy 50 million light-years away, a star exploded. Light from that supernova was first detected by telescopes on planet Earth on July 14th though, and the extragalactic transient is now known to astronomers as supernova 2025rbs. Presently the brightest supernova in planet Earth's sky, 2025rbs is a Type Ia supernova, likely caused by the thermonuclear detonation of a white dwarf star that accreted material from a companion in a binary star system. Type Ia supernovae are used as standard candles to establish the distance scale of the universe. The host galaxy of 2025rbs is NGC 7331. Itself a bright spiral galaxy in the northern constellation Pegasus, NGC 7331 is often touted as an analog to our own Milky Way.