Two stars are identified on the Hertzsprung-Russell diagram below. Hertzsprung-Russell Diagram Temperature (K) 40,000 20,000 10,000 7,500 5,500 4,500 3,000 10 10 10 10 10 A K M Spectral Class Based on this diagram, how do the characteristics of Star 1 and Star 2 compare? O Star 1 is cooler and less bright than Star 2. O Star 1 is hotter and brighter than Star 2. O Star 1 is cooler and brighter than Star 2. Star 1 is hotter and less bright than Star 2. Luminosity 2..

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