Question

history of telescope

Answer 1

The earliest known telescopeappeared in 1608 in the Netherlands when an eyeglass maker named Hans Lippershey tried to obtain a patent on one. ... The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece.

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Answer 2

The earliest known telescope appeared in 1608 in the Netherlands when an eyeglassmaker named Hans Lippershey tried to obtain a patent on one. Although Lippershey did not receive his patent, news of the new invention soon spread across Europe. The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece. Galileo improved on this design the following year and applied it to astronomy. In 1611, Johannes Kepler described how a far more useful telescope could be made with a convex objective lens and a convex eyepiece lens and by 1655 astronomers such as Christiaan Huygens were building powerful but unwieldy Keplerian telescopes with compound eyepieces.[1]
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