撞击小行星Dimorphos
(原标题: Collision at Asteroid Dimorphos)
2025-07-28
浏览次数: 1485
为什么这次碰撞如此奇怪？2022年，为了开发拯救地球的技术，美国宇航局故意将DART宇宙飞船撞向小行星小卫星Dimorphos。人们希望这次碰撞能改变Dimorphos围绕其母小行星Didymos的轨道，从而证明类似的碰撞在理论上可以拯救地球免受（其他）危险小行星的撞击。但对新结果的分析表明，碰撞的影响与预期不同——我们正试图理解其中的原因。这里的特色是由弹出的LICIACube相机LUKE拍摄的延时视频，显示了碰撞后大约250秒的Dimorphos碎片场扩展，未受影响的Didymos在前景中经过。2026年，欧洲的赫拉任务将到达小行星，并释放三艘航天器来更好地研究这一问题。
查看原文解释
Why was this collision so strange? In 2022, to develop Earth-saving technology, NASA deliberately crashed the DART spacecraft into the asteroid moonlet Dimorphos. The hope was that this collision would alter the trajectory of Dimorphos around its parent asteroid Didymos and so demonstrate that similar collisions could, in theory, save the Earth from being hit by (other) hazardous asteroids. But analyses of new results show that the effects of the collision are different than expected -- and we are trying to understand why. Featured here is the time lapse video taken by the ejected LICIACube camera LUKE showing about 250 seconds of the expanding debris field of Dimorphos after the collision, with un-impacted Didymos passing in the foreground. In 2026, Europe's Hera mission will reach the asteroids and release three spacecraft to better study the matter.