Question: what is the difference between a red giant and a neutron star?
Answer: Composition: a red giant is mainly composed of hydrogen, with an inert core of helium, carbon, oxygen and neon or silicon, while a neutron star has a thick shell of solid iron with a core of neutrons. ... Mass: a red giant has between 0.5 and 15 times the mass of the Sun, a neutron star has 2-3.