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The Hertzspru...

Question

The Hertzsprung-Russell Diagram

A

is based on the principle that the intrinsic brightnesses of most stars are related to their temperatures.

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B

most stars have the same temperature.

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C

was developed in the 1950s by two American astronomers working for NASA.

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D

while of great utility for most large stars, has proven of little value in classifying small stars like our sun.

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Solution

The correct option is B is based on the principle that the intrinsic brightnesses of most stars are related to their temperatures.
HR diagram plots each star on a graph measuring the star's brightness against its temperature (color). It does not map any locations of stars.

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