yes he used it when he discovered all the moons of jupiter
Refracting telescope
no
yeah
at his lab in 1593.
The telescope was actually invented by Hans Lippershey in 1608; Galileo merely improved it.
He improved on the existing telescope around 1609
He invented the reflecting telescope. Galileo was the first to use the telescope for studies of the heavens.
He didn't he improved the existing telescope and turned it to astronomical use around 1609
Galileo Galilei didn't actually invent the telescope but he made vast improvements to the first design.
Galileo didn't invent anything he just helped improve the telescope.
Galileo Galilei did not invent the first telescope; it was invented by Dutch eyeglass maker Hans Lippershey in 1608. Galileo, however, heard about this invention and created his own improved version in 1609, which he used to make groundbreaking astronomical observations.
Galileo Galilei is primarily known for his improvements to the telescope, which he used to observe the moons of Jupiter and sunspots. He did not invent the telescope, but his contributions to its design and use revolutionized astronomy.