Galaxies of stars are like people traveling through the cosmos together in one group.
Elliptical galaxies have a direction of travel, that is why they are elliptical.
A galaxy gets it first massive supernova, and a black hole is formed, and it becomes a spiral galaxy, kind of like when a seismic social event happens and everyone gets in line.
You might enjoy this if you haven't already seen it: https://youtu.be/71eUes30gwc - TL;DW black hole density decreases with increasing radius, and the average density of the observable Universe is potentially greater than that of an equivalent-sized black hole, so maybe the whole Universe is inside one...
Galaxies of stars are like people traveling through the cosmos together in one group.
Elliptical galaxies have a direction of travel, that is why they are elliptical.
A galaxy gets it first massive supernova, and a black hole is formed, and it becomes a spiral galaxy, kind of like when a seismic social event happens and everyone gets in line.