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What is a large reddish star late in its life cycle called?

A large reddish star late in its life cycle is called a red giant. This stage occurs when a star expands and cools as it exhausts its nuclear fuel, causing it to become larger and redder in color. Eventually, red giants evolve into other stellar remnants such as white dwarfs or supernovae.


Why is the density of Betelgeuse so low?

The low density of Betelgeuse is due to its outer layers being expanded and less compact compared to other stars. Betelgeuse is a red supergiant star in a late stage of its life cycle, causing it to have lower density as it has expanded to a large size.


Will a protostar form near the end of a star's life cycle?

No, a protostar is basically the BEGINNING of a star's life cycle.


What is different about the starting nebula of a medium star cycle and a large star cycle?

The starting nebula of a medium star cycle and a large star cycle differs primarily in mass and density. Medium stars, like our Sun, typically form from nebulae that have a lower mass and are less dense, allowing for a more gradual accumulation of material. In contrast, large stars originate from more massive and denser nebulae, which can lead to a faster and more violent formation process. This difference in initial conditions influences their subsequent life cycles and eventual fates.


What is the difference of a nebula and a supernova?

A nebula contains stars and other matter; a supernova is just a large enough nova, or star that explodes at the end of its life cycle due to spent fuel