alleryAryabhata calculated the sidereal rotation of the Earth as about how long?
A24 h 0 min 0 s
B23 h 56 min 4.1 s
C23 h 30 min 0 s
D24 h 4 min 0 s
Answer & Solution
Correct answer: B. 23 h 56 min 4.1 s
1. Sidereal rotation is measured against the fixed stars.
2. Aryabhata gave 23 hours, 56 minutes and 4.1 seconds.
3. The modern value is 23:56:4.091, so the other options are far off.
_Source: Wikipedia, Aryabhata, Sidereal periods_
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