1. The brightness of stars as they appear from Earth is measured by magnitude. A. apparent B. relative C. light D. absolute 2. The idea that the universe is expanding was discovered in the late 1920s by A. Hertzsprung. B. Hubble. C. Doppler. D. Ru

1. The brightness of stars as they appear from Earth is measured by magnitude. A. apparent B. relative C. light D. absolute 2. The idea that the universe is expanding was discovered in the late 1920s by A. Hertzsprung. B. Hubble. C. Doppler. D. Ru

1. The brightness of stars as they appear from Earth is measured by magnitude. A. apparent B. relative C. light D. absolute 2. The idea that the universe is expanding was discovered in the late 1920s by A. Hertzsprung. B. Hubble. C. Doppler. D. Ru


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