Question

Difference Between a red giant and neutron star

Answer 1

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Size: a red giant is 100,000,000km in radius, a neutron star is 5.

Temperature and color: a red giant is less than 4,000K, and a deep red, while a neutron star is over 100,000K and an electric blue.

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.

Luminosity: a red giant has a luminosity thousands or hundreds of thousands of times that of the Sun, while a neutron star has a luminosity tens of thousandths of that of the Sun.

Point in life cycle: a red giant is an intermediate to late phase, while a neutron star is the absolute endpoint.

Mass: a red giant has between 0.5 and 15 times the mass of the Sun, a neutron star has 2-3.

They are literally polar opposites.

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