Concept explainers
To determine: The rank in order of increasing age of a white dwarf, a protostar, a red giant, a yellow medium-sized star.
Answer:
The rank in order of increasing age is a protostar < a red giant < a yellow medium-sized star < white dwarf.
Explanation:
The life span of a protostar depends on its size, but it is shorter as compared to the sequence and cannot exceed 1 million years.
A red giant is a highly bright and low-mass star of life span 10's to 100's of millions of years, but the lifespan of a red giant star cannot exceed 1 billion years.
Our Sun is considered as a medium-sized yellow star with a life span of
The life span of the white dwarf is calculated to be longer than the current age of the universe. The average life span of a dwarf star varies from
Conclusion:
Therefore, the rank in order of increasing age is a protostar < a red giant < a yellow medium-sized star < white dwarf.
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