Stars and Their Life Cycles
Physics ⇒ Earth and Space Physics
Stars and Their Life Cycles starts at 8 and continues till grade 12.
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Calculate the approximate lifetime of a star that is 10 times more massive than the Sun, given that the Sun's main sequence lifetime is about 10 billion years and the lifetime scales as (mass)$^{-2.5}$.
Context: A star is observed to be in the red supergiant phase. What is the next likely major event in its life cycle?
Describe the process that leads to the formation of a protostar.
Describe the role of gravity in both the formation and death of stars.
Describe what happens during a supernova explosion.
Explain the difference between a red giant and a white dwarf.
Explain why massive stars have shorter lifespans than less massive stars.
Explain why white dwarfs do not undergo further fusion reactions.
What is the Chandrasekhar limit?
What is the final stage of a low-mass star's life cycle?
What is the primary force responsible for the formation of stars from nebulae?
Which process provides the energy that makes stars shine during the main sequence phase?
Calculate the ratio of the main sequence lifetimes of two stars, one with a mass of 2 solar masses and the other with 8 solar masses. Assume the main sequence lifetime scales as (mass)-2.5.
Context: A star is observed to have a surface temperature of 3,000 K and a luminosity 1,000 times that of the Sun. Based on its position on the Hertzsprung-Russell diagram, what is the most likely evolutionary stage of this star?
Describe the process of nucleosynthesis in massive stars and explain how it leads to the formation of elements heavier than iron.
Explain the process of mass transfer in a binary star system and its impact on the evolution of the stars involved.
