浮想联翩：银河系不仅以 600 公里/秒的速度飞行,而且像蝴蝶一样“拍打翅膀”

the Milky Way is not only flying at 600 km/s, but also “flapping its wings” like a butterflypic.twitter.com/wiie1m01X0

— All day Astronomy (@forallcurious) October 13, 2025