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- Approximately how long is one astronomical unit (1 a.u.)?
Question 1:
Approximately how long is one astronomical unit (1 a.u.)?
A. 174,000,000 km /108,118,587 miles
B. 8,000,000 km/ 4,970,969 miles
C. 149,597,000 km/ 92,955,266 miles
D. 878,000,000 km/ 545,563,907 miles
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