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It is not known for certain who found the telescope. According to a rumor, in 1608, a glasses maker from Mid-Decburg named Hans Lippershey in the Netherlands, one day by chance, looked through two consecutive lenses and saw the wind rose of the nearby church as very large, so he discovered the telescope. But according to some, the telescope was also known before 1608. After the telescope was found, it quickly spread to other countries.
The Italian scientist Galileo Galilei realized that the telescope could be very useful for astronomy. Starting from 1610, Galileo built several telescopes for himself and made many important astronomical discoveries with them. These discoveries, which include the mountains on the Moon, the four largest moons of Jupiter, the phases of Venus, the fields of stars in the Milky Way Galaxy and sunspots, constitute a turning point in the history of astronomy. Previously, all telescopes were made of a convex lens with a concave lens. They were called the Galileo telescope.
The German astronomer Johannes Kepler suggested that a better telescope could be made using two convex lenses instead of one concave and one convex lens, and the first telescope of this type was carried out circa 1630. It turned out that this type of telescope, called the Kepler telescope, was more suitable for astronomy than the Galileo telescopes, and the Kepler telescope soon became widespread
