31) Although mass transfer can occur in binary stars, the : 1828915
31) Although mass transfer can occur in binary stars, the small mass change does not impact the evolution of either companion.
32) A white dwarf's atoms have their electron orbitals crushed as closely as the Exclusion Principle allows.
33) White dwarfs were once the cores of stars that produced planetary nebulae.
34) Solar mass stars eventually become hot enough for carbon nuclei to fuse together.
35) It is the formation of iron in an evolved giant's core that triggers a Type II supernova event.
36) In the cores of the most massive stars, the electrons and protons fuse together and form neutrons.
37) Elements heavier than iron are formed mainly in supernovae.
38) Only low mass stars experience the temporary instability of the helium flash; high mass stars go directly into heavier element formation.
39) A massive star may change its color and size notably, but its high luminosity remains fairly constant.
40) The formation of carbon requires a core temperature of about 100 million K, but iron takes much higher temperatures and pressures.