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Practice #36,493
Q
Who was the first Indian astronomer to calculate the time taken by Earth to orbit the Sun? पृथ्वी द्वारा सूर्य की परिक्रमा में लगने वाले समय की गणना करने वाले पहले भारतीय खगोलशास्त्री कौन थे? (SSC 10+2 CHSL 30/01/17 1:15 PM)
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