He had time to think. Something so rare these days. 30 years later, Henry Cavendish measured G and estimated the density of the earth. Using candles, mirrors a

He had time to think. Something so rare these days. 30 years later, Henry Cavendish measured G and estimated the density of the earth. Using candles, mirrors and telescopes. https://en.wikipedia.org/wiki/Cavendish_experiment https://en.wikipedia.org/wiki/Cavendish_experiment