“Gravity was discovered by Newton? Lol. Read John Playfair’s treatise from 1794 where he clearly says that the Hindus knew about gravity around 4500BC. The Sanskrit root “grah” means to grab/to attract/ and is used to describe celestial bodies.”
That (some English contemporary of Newton saying this) doesn’t necessarily mean the claim was right, of course. Computing planetary positions does not necessarily require a theory of gravity as clear as Newton’s.