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astronomy
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Astronomy
Why are Cepheids called beacons of the universe?
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1
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11
1
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foxargon
7y ago
2
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0
38.15
q
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2
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Astronomy
What are physical binary stars and how are they distinguished by the method of observation?
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14
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foxargon
7y ago
0
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0
4.9
q
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0
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Astronomy
How many stars are in the universe?
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12
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foxargon
7y ago
0
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0
4.2
q
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0
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