Unit VIII Assessment - Question 1 4 out of 4 points The...

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Question 1 4 out of 4 pointsThe brightness ratio of two stars differing by only one magnitude is approximately:
Question 2 4 out of 4 pointsWhich main-sequence stars are the least massive?
Question 3 4 out of 4 pointsWhich theory held that the Earth was a sphere that stayed motionless at the center of the universe?
Question 4 4 out of 4 points
Based on the observed red shifts in the spectral lines of distant galaxies, astronomers conclude that:
Question 5 4 out of 4 pointsWhich of the following astronomers derived two basic laws of planetary motion, then later added a third?

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