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Newtonian telescope is a kind of reflecting telescope that has a concave primary mirror and a flat secondary mirror. It is patterned after the telescope invented by Sir Isaac Newton, the famous British astronomer and scientist who during the 17th century. Sir Newton first invented this kind of telescope in 1668. His telescope had a simple yet functional design. Today, the Newtonian telescope.
The telescope was introduced to astronomy in 1609 by the great Italian scientist Galileo Galilei -- the first man to see the craters on the moon. He went on to discover sunspots, the four large moons of Jupiter and the rings of Saturn. His telescope was similar to opera glasses. It used an arrangement of glass lenses to magnify objects.
Newton’s reflecting telescope. Isaac Newton found that the telescopic effect can also be obtained using the mirrors instead of lenses, and he made the first reflecting telescope. These telescopes were called reflecting telescopes or Newtonian telescopes because they used the reflecting power of the mirror to reflect and focus the light.Using mirrors greatly increased the power of telescopes.
The telescope’s invention is often pegged in 1608 with the award of a patent to Lippershey by the States-General, the name for parliament in the Netherlands. However, an Englishman, Thomas Harriott constructed an early, low-power version of the telescope and used it in August 1609 to observe the Moon, at the same time when Galileo presented a similar small instrument to the Venetian Senate.
Development in the invention of reflecting telescope In 1722, John Hadley developed a design that used parabolic mirrors, and there were various other improvements in mirror-making. The major change that took place was the growth in the size of the reflecting mirror, from the 6-inch mirror used by Newton to the 6-meter (236 inches in diameter) mirror of the Special Astrophysical Observatory in.
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