Castelli was so impressed that he wrote to Galileo himself, at this time living in his home in Arcetri near Florence, watched over by officers from the Inquisition.
Castelli kaya ay impressed na siya wrote Galileo sa kanyang sarili, sa oras na ito na naninirahan sa kanyang tahanan sa Arcetri malapit sa Florence, Watched over ng mga opisyal mula sa pagtatanong .