18-25


Sun Grid NASA

0
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Observing the Lunar Motion through the Stars -Timing Grazing Occultations of Stars by the Moon

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Διαβάσεις της Αφροδίτης και του Ερμή μπροστά από τον Ηλιακό Δίσκο

0
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Calculating the speed of light

5
Average: 5 (2 votes)
Certified content by Discover the COSMOS
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Spectrum with Salsa J

5
Average: 5 (3 votes)
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Setting scales with Salsa J

5
Average: 5 (3 votes)
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Measurements with Salsa J

5
Average: 5 (3 votes)
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Photometry with Salsa J

4.666665
Average: 4.7 (3 votes)
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