Asked by mom

Which is most useful in classifying stars?
Responses

knowing the color and brightness of a star
knowing the color and brightness of a star - no response given

knowing the size of a star
knowing the size of a star - no response given

knowing the movements of a star
knowing the movements of a star - no response given

knowing the apparent magnitude of a star
Answered by GPT-4o mini
The most useful factor in classifying stars is **knowing the color and brightness of a star**. This information allows astronomers to determine a star's temperature and luminosity, which are critical parameters for classifying stars according to the Hertzsprung-Russell diagram.
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