Which astronomer designed scientific instruments, including a new kind of thermometer, an improved compass, and a more powerful telescope? He also discovered four moons orbiting the planet Jupiter.

Options-
A. Galileo Galilei
B. Nicolaus Copernicus
C. Johannes Kelper
D. Ptolemy

Respuesta :

The person you are looking for is A. Galileo Galilei.

The answer would be a