Oh, I totally get the usual reason. But as an astronomer, when I look up at the night sky, I think about how all that glowing stuff was assembled by gravity, wi

Oh, I totally get the usual reason. But as an astronomer, when I look up at the night sky, I think about how all that glowing stuff was assembled by gravity, with magnetism playing a supporting role by driving the Balbus-Hawley instability in accretion disks[1]. 1: https://en.wikipedia.org/wiki/Magnetorotational_instability https://en.wikipedia.org/wiki/Magnetorotational_instability