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Telescopes are the devices that are used to keep an observatory eye on the astronomical bodies. These are actually very helpful because no other devices have been attributed such power to enable seeing far away objects.

Nonetheless, to say, telescopes have a huge contribution in the field of astronomical science that has helped in the discovery of several planets and other heavenly bodies. In these days, the popularity of the telescopes is increasing day by day. But, the original telescope that is made in the earlier days was not same as like of the present days. Here, is the history of the telescope.

Earliest Mention of Telescope                     

Galileo Galilei of Venice communicated the details of his invention to Doge Leonardo Donato. The Senate rewarded him by doubling his salary and letting him settle for life in Padua for his lectureship. This was in 1608. The later time he spent in improving the instrument and increasing its power. With the last instrument, he made he had used it to discover the satellites of Jupiter in 1610 and spots on sun, hills and valleys on Moon and the phases of Venus.

The Discovery

Talking about the origination of the telescopes, it is believed that the earliest one was used in 1608 in Netherlands by Hans Lippershey. The earlier telescopes consisted of a convex lens and a convex lens for the eyes.  It had a 3X magnification. After this, telescopes became quite commonly made in Europe to see far away things like they were nearby.

In 1688, Sir Issac Newton was the one to build the practical telescopes with a small flat mirror placed diagonally to reflect light to the eyepiece that is mounted on the side of the telescope.

Further Modifications

These Brass Telescopes however suffered problems with speculum metal mirrors. Later several numbers of Great Refractors were made from 60 cm to 1-metre aperture. In the 1900s the ever larger reflectors using the glass mirrors were made, that includes Mount Wilson, Hooker Telescope and the Hale Telescope. In the 1970s came the computer controlled telescopes with Keck telescopes, Gemini Observatory, Subaru Telescope and ESO Very Large Telescope.