Stellar evolution has been best understood by:
A) analyzing the properties of a large number of stars at a single instant.
B) observing the entire life cycles of individual high-mass stars.
C) measuring stars moving along the main sequence.
D) computer models without the input of observations.

Question

Quizplus · Accepted Answer

Stellar evolution is best understood by analyzing the properties of a large number of stars at a single instant, as this allows astronomers to observe stars at different stages of their life cycles simultaneously. Observing the entire life cycle of individual stars, especially high-mass stars, is impractical due to the vast time scales involved.

Stellar Evolution Has Been Best Understood By