in the late 1700s
One could not simply point a telescope at the sky and find planets. Galileo calculated the positions of various planets at different times of the year. His observations led him to adopt the heliocentric theories of Copernicus.
Nothing because he published it in the same year that he died.
Copernicus was never imprisoned.
Galileo was arrested in 1823
1543
1473
Galileo Died on January 8, 1642.
Galileo Died on January 8, 1642.
Galileo discovered Saturn's Rings in 1610
Copernicus died a very natural death in 1543, apparently of a stroke, at age 70.
1473
Copernicus died a very natural death in 1543, apparently of a stroke, at age 70.