韦伯和哈勃望远镜拍摄的螺旋星系碰撞
(原标题: Colliding Spiral Galaxies from Webb and Hubble)
2025-01-06
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数十亿年后，这两个星系中只有一个还会存在。在那之前，螺旋星系NGC 2207和IC 2163将慢慢地相互拉开，产生物质潮汐、激波气体、暗尘带、恒星形成的爆发和被抛弃的恒星流。这张科学配色的特色图片是哈勃在可见光下的曝光和韦伯在红外光下的曝光的合成。天文学家预测，右边较大的星系NGC 2207最终会合并左边较小的星系IC 2163。在最近一次相遇中，大约在4000万年前达到顶峰，较小的星系逆时针旋转，现在稍微落后于较大的星系。恒星之间的空间是如此之大，以至于当星系碰撞时，其中的恒星通常不会碰撞。拼图挑战：当天的天文学难题
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Billions of years from now, only one of these two galaxies will remain. Until then, spiral galaxies NGC 2207 and IC 2163 will slowly pull each other apart, creating tides of matter, sheets of shocked gas, lanes of dark dust, bursts of star formation, and streams of cast-away stars. The featured image in scientifically assigned colors is a composite of Hubble exposures in visible light and Webb exposures in infrared light. Astronomers predict that NGC 2207, the larger galaxy on the right, will eventually incorporate IC 2163, the smaller galaxy on the left. In the most recent encounter that about peaked 40 million years ago, the smaller galaxy is swinging around counter-clockwise and is now slightly behind the larger galaxy. The space between stars is so vast that when galaxies collide, the stars in them usually do not collide. Jigsaw Challenge: Astronomy Puzzle of the Day