arp274的螺旋星系碰撞
(原标题: The Colliding Spiral Galaxies of Arp 274)
2023-01-23
浏览次数: 18
两个星系在室女座对峙，这是最新的照片。当两个星系相撞时，组成它们的恒星通常不会相撞。这是因为星系大多是空旷的空间，无论多么明亮，恒星只占据了空间的一小部分。但在碰撞过程中，一个星系可以通过引力将另一个星系撕裂，两个星系共有的尘埃和气体确实会发生碰撞。如果两个星系合并，可能存在于每个星系中心的黑洞最终也会合并。因为距离是如此之大，整个过程都是慢动作的——持续了数亿年。除了这两个大的螺旋星系外，在Arp 274（也被称为NGC 5679）的特色图像的最左边可以看到一个较小的第三个星系。Arp 274直径约20万光年，距离室女座约4亿光年。夜空网络研讨会：APOD编辑回顾2022年最佳太空图像
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Two galaxies are squaring off in Virgo and here are the latest pictures. When two galaxies collide, the stars that compose them usually do not. This is because galaxies are mostly empty space and, however bright, stars only take up only a small fraction of that space. But during the collision, one galaxy can rip the other apart gravitationally, and dust and gas common to both galaxies does collide. If the two galaxies merge, black holes that likely resided in each galaxy center may eventually merge. Because the distances are so large, the whole thing takes place in slow motion -- over hundreds of millions of years. Besides the two large spiral galaxies, a smaller third galaxy is visible on the far left of the featured image of Arp 274, also known as NGC 5679. Arp 274 spans about 200,000 light years across and lies about 400 million light years away toward the constellation of Virgo. Night Sky Network webinar: APOD editor to review best space images of 2022