In the early 1970s,astronomers Alar and Jun Toomre predicted that the odd shape of two relatively nearby galaxies,dubbed the Mice after their rodent-like tails,could be explained by a fantastic collision between them.

• 在二十世纪七十年代早期，天文学家艾拉和裘利·图木尔就曾预言那两个因为有像啮齿动物一样的尾巴而被别称为“老鼠”的相对较近的星系的奇怪形状可以用发生在两者之间的奇怪的撞击来解释。