侧向螺旋中的超新星
(原标题: Supernova in a Sideways Spiral)
2026-05-07
浏览次数: 1516
很久以前，在一个遥远的星系中，一颗巨大的恒星在超新星爆炸中被摧毁。这一事件发出的光经过了数千万年的传播，并于上周以超新星2026kid的形式抵达地球。这段特色视频显示了宿主星系NGC 5907在三个晚上的时间推移，这是一个侧面螺旋星系，也被称为分裂星系或刀锋星系，随着超新星的出现和变亮。（偶尔出现的条纹是地球轨道上的卫星。）在最亮的时候，超新星的亮度可以超过其星系中所有其他恒星的总和。超新星2026kid看起来相对暗淡，可能是因为我们是通过星系边缘的圆盘看到它的。在类似银河系的星系中，这样的爆炸通常每世纪发生一次，它们发出的光需要几个月的时间才能消失。历史记录中最亮的超新星是SN 1006；据报道，它比金星还亮，甚至在白天也能在天空中看到。
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A long time ago, in a distant galaxy, a massive star was destroyed in a supernova explosion. The light of this event travelled for tens of millions of years and reached Earth last week as Supernova 2026kid. The featured video shows a time-lapse over three nights of the host galaxy NGC 5907, an edge-on spiral also known as the Splinter or Knife Edge Galaxy, as the supernova appears and becomes brighter. (The occasional streaks are satellites in Earth orbit.) At its brightest, a supernova can outshine the sum of all other stars in its galaxy. Supernova 2026kid appears relatively dim, probably because we are seeing it through the edge-on disk of the galaxy. Such explosions typically happen about once per century in galaxies similar to the Milky Way, and their light can take months to fade away. The brightest supernova in recorded history was SN 1006; it is reported to have been brighter than Venus, and even visible in the sky during daytime.