For protons in the star, m is about 2000 times higher, so for the same N/V the Fermi energy and pressure are about 2000 times smaller

• For protons in the star, m is about 2000 times higher, so for the same N/V the Fermi energy and pressure are about 2000 times smaller

• Hence in a compact star many more electrons than other particles have high velocity, and the majority of gas pressure is due to electrons

• The more compact a star, the higher the electrons' Fermi energy and their corresponding momentum and pressure

• So we can get a compact yet stable star where the high gravitational pressure trying to collapse the star is balanced by an equally high electron pressure - the WD stars