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How much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope?.
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How much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope?.

User Alyaxey
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The light-collecting area would be 4x greater on a 6-meter (which has 36) telescope than a 3-meter telescope (which has 9).

User Tomas Bruckner
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