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killian killian
wrote...
Silver Member
Posts: 6024
10 years ago
The total number of stars in the observable universe is about ________.
A) 100 billion
B) the same as the number of grains of sand in a school sandbox
C) the same as the number of grains of sand on all the beaches on Earth
D) the same as the number of atoms that make up the Earth
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padrepadre
wrote...
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Educator
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Posts: 21610
10 years ago
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Mastering in Nutritional Biology
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killian Author
wrote...
Silver Member
10 years ago
Thanks for helping me with my astronomy, very thankful.
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