Astronomy
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13
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33
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33
Posts %
2
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1
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33
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33
Posts %
1
Score
1
Posts
33
Posts %
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13
Has anyone back-calculated previous close encounters between the Apophis asteroid and Earth?
Mar 28, 2021
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2
How would the temperature on earth be if the sun was slightly more or less powerful?
Mar 28, 2021
answer
1
How to determine when Sun/Moon is aligned to two location on Earth's surface?
Mar 28, 2021

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