2021年04月11日

When Black Holes Collide
Video Credit & Copyright:
Simulating Extreme Spacetimes Collaboration

Explanation: What happens when two black holes collide? This extreme scenario occurs in the centers of many merging galaxies and multiple star systems. The featured video shows a computer animation of the final stages of such a merger, while highlighting the gravitational lensing effects that would appear on a background starfield. The black regions indicate the event horizons of the dynamic duo, while a surrounding ring of shifting background stars indicates the position of their combined Einstein ring. All background stars not only have images visible outside of this Einstein ring, but also have one or more companion images visible on the inside. Eventually the two black holes coalesce. The end stages of such a merger is now known to produce a strong blast of gravitational radiation, providing a new way to see our universe.

This Week is: Black Hole Week at NASA

Tomorrow’s picture: flame without fire


黑洞互撞
影片提供及版权:
Simulating Extreme Spacetimes Collaboration

说明: 当二颗黑互撞会发生什么?这种极端的场景,可能出现在某些合并中的星系和多恒星系统的中心。这部主题影片呈现了此种合并最末阶段的电脑模拟,同时也突显了重力透镜效应对背景星场所造成的影响。影像中的黝黑区块,代表这对天体的事件视界,而周围不停变动的背景恒星环,则是它们共同的爱因斯坦环。所有的背景恒星,不但有出现在这个爱因斯坦环之外的影子,在其内也有一个或多个伴随影像。最终,这二颗黑洞会合并,而在合并的最终阶段,会辐射出强烈的重力辐射,提供一个探索我们宇宙的新管道。

本周是: NASA的黑洞周

明日的图片: flame without fire

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