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staedtler staedtler
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7 years ago
How many 2nd-magnitude stars would be needed in a close cluster to match the light intensity of a 1st-magnitude star?
   A)  About 2.5    B)  2    C)  About 10    D)  About 0.4, or 1/2.5
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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hyponoticahyponotica
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7 years ago
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staedtler Author
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6 years ago
On behalf of my study group and I, thank you
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