2019
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Australia
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Japan
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India
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China
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Detailed explanation-1: -The Steward Observatory Mirror Lab produced the 6.5-metre f/1.25 collimator used in the Large Optical Test and Integration Site of Lockheed Martin, used for vacuum optical testing of other telescopes.
Detailed explanation-2: -In the early 1840’s, the Third Earl of Rosse designed and built the largest telescope in the world. With this telescope, he discovered the spiral nature of some of the galaxies, and from 1845-1914, anyone wishing to witness this phenomenon had to come to Birr.
Detailed explanation-3: -Gran Telescopio Canarias (GTC), the largest optical telescope in the world, with a mirror that has a diameter of 10.4 metres (34.1 feet). It is located at the Roque de los Muchachos Observatory on La Palma (2,326 metres [7,631 feet]) in the Canary Islands of Spain.
Detailed explanation-4: -The biggest optical telescope in operation is the Gran Telescopio Canarias (GTC), with an aperture of 10.4 metres.