Yeah~ CFHT captured a photo that the lunar dust was ejected by the impact of the SMART-1 on the Moon. Could you see the expansion of the dust cloud? It’s followed by the image of the impact of SMART-1.
As the force of impact was so great that the reflecting force was as great as it, the acceleration was fast too according to the formula F=ma. Thus, the cloud expanded at such a high speed.
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