Probably because without telescopes people wouldn't know that there were other planets
(except that in addition to Earth, you can see five other planets without a telescope,
but hey . . .)
The invention of airplanes was so impotant because it could travel farther and faster and it became a new level of fighting in war.
Galileo is credited with the invention of the Telescope. Galileo was Italian.
Newton's first major public scientific achievement was the invention, design and construction of a reflecting telescope.
the telescope
copernicus invented the telescope
telescope
The invention of the telescope.
Nothing, what gave you that impression?
The telescope.
The telescope
Galileo didn't invent anything he just helped improve the telescope.
telescope