The most important factor is the stars mass.
Hydrogen, helium, and carbon fuel are found in more massive stars. The diameter of more massive stars is bigger. Helium is found in greater abundance in more massive stars. The weight of more massive stars is greater.
Mass. Higher mass stars, while having more fuel to burn, counterintuitavely have shorter lifespans, as they are able to bring more of that mass to temperatures capable of supporting fusion.
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The young star stage because at that stage, stars are just burning, no interruptions or disturbances
Stars with a low to medium mass will become white dwarfs. Massive stars will become neutron stars or black holes.
Hydrogen, helium, and carbon fuel are found in more massive stars. The diameter of more massive stars is bigger. Helium is found in greater abundance in more massive stars. The weight of more massive stars is greater.
parallax
Binary stars are very useful for determining the mass of the stars and thus any objects orbiting around them.
Mass. Higher mass stars, while having more fuel to burn, counterintuitavely have shorter lifespans, as they are able to bring more of that mass to temperatures capable of supporting fusion.
you skip the question!
The most important fusion process in nature is that which powers the stars. The net result is the fusion of four protons into one alpha particle, with the release of two positrons, two neutrinos (which changes two of the protons into neutrons), and energy, but several individual reactions are involved, depending on the mass of the star. For stars the size of the sun or smaller, the proton-proton chain dominates. In heavier stars, the CNO cycle is more important. Look up CNO cycle in Wikipedia
Stars that produce most of their energy by the CNO cycle are predominantly those with a mass about 1.3 times the mass of our Sun or greater.Our Sun, and stars comparable in mass or less, predominantly use the proton-proton cycle.
yes stars are important for animals
The "star life cycle" refers to stars. Earth is not a star.
Nobody "invented" it, the life cycle of stars happens naturally.
In the nebula!
water cycle, rock cycle, carbon dioxide/oxygen cycle, nitrogen cycle