The remnant of a supernova, first seen from Earth more than a thousand years ago, hangs like a gumball in a composite image released by NASA in June.

• 在这张美国国家航空航天局六月份公布的合成图像里，一颗首次在地球上看到的1000多年前的超新星的残骸看起来像一盏警车顶灯。