alleyoopoop t1_j26ug0v wrote on December 30, 2022 at 1:57 AM Reply to comment by Aseyhe in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey > Note that this implies the galaxy cannot be rotating rigidly. Objects closer to the center have shorter orbital periods. Is that why many galaxies are spiral shaped? Permalink Parent 1
alleyoopoop t1_j26ug0v wrote
Reply to comment by Aseyhe in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey
> Note that this implies the galaxy cannot be rotating rigidly. Objects closer to the center have shorter orbital periods.
Is that why many galaxies are spiral shaped?