Which of the following was not discovered by Aryabhatta?

Correct option is C

The correct answer is (C) The earth revolves around the sun

Explanation:
• Aryabhatta (5th century CE) was a pioneering mathematician and astronomer. In his work 'Aryabhatiya', he correctly identified that the Earth is spherical (Gola) and that it rotates on its own axis (creating day and night).
• He was also the first to give a scientific explanation for eclipses, stating that lunar eclipses are caused by the shadow of the Earth falling on the Moon, and solar eclipses are caused by the Moon passing between the Earth and the Sun.
• However, like most astronomers of his time, his model was Geocentric (Earth at the center). The discovery of Heliocentrism (the Earth revolving around the Sun) is generally credited much later to Copernicus in Europe, although some ancient Indian texts hinted at it, it was not a core 'discovery' attributed to Aryabhatta in his mathematical models.
• His work on the value of Pi (3.1416) and the place-value system were revolutionary.

Information Booster:
• Aryabhatta was the head of the Nalanda University according to some traditions.
• India's first satellite was named 'Aryabhata' in his honor.

Additional Knowledge:
• Option A & B: Aryabhatta used the term 'achal bham' (the stars are fixed) to explain that it is the Earth's rotation that makes stars appear to move.
• Option D: He rejected the mythological explanation of Rahu and Ketu swallowing the sun/moon.