Theory 89/Cosmic/Galaxy morphology
Morphology Is Disk Against Bulge
The claim
Galaxy morphology is set by the ratio of disk mass to bulge mass, so the same total mass produces spirals or ellipticals depending on the split.
01Mechanism
Disks form from ordered gas while bulges form from mergers and instabilities; the ratio records that history.
02Prediction
Morphology should track the ratio.
03Refutation
Morphology tracking total mass would remove the split.