Verified answer

He was kept under house arrest in his own home at Arceti, near Florence, where he continued his researches and completed his Discourses on the Two New Sciences (1638).

In 1637 he became blind, but continued working until his death, on 8 January 1642.

What had upset the Pope was his support for Copernicus's theory that the sun was the centre of the universe, not the earth. This was contrary to the teachings of the church, which had supported the views of Aristotle and other Greek philosophers.

They made him drink hemlock, for corrupting Europe's youths. He did, and passed out for several days. His physical strength impressed the pope. They attempted to kill him with knives, from which while bleeding he collapsed and fell into a tranquil pond/lake, ice covering his body, eventually.