Two stars are identified on the Hertzsprung-Russell diagram below.
Based on this diagram, how do the characteristics of Star 1 and Star 2 compare?
Star 1 is cooler and less bright than Star 2.
Star 1 is cooler and brighter than Star 2.
Star 1 is hotter and brighter than Star 2.
Star 1 is hotter and less bright than Star 2.
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