The telescope. The telescope constitutes one of humankind's most important inventions. The earliest known telescope appeared in 1608 in the Netherlands.
Galileo Galilei was an Italian astronomer, physicist and engineer. He has been known as the "father of observational astronomy", the "father of modern physics", the "father of the scientific method", and the "father of modern science".
Galileo used to work by using the telescope for scientific observations of celestial objects.
