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The 100 inch (2.5 m) Hooker reflectin telescope at Munt Wilson Observatory near Los Angeles, Californie.

A telescope is an instrument that aids in the observation o remote objects bi collectin electromagnetic radiation (such as veesible licht). The first kent practical telescopes wur invented in the Netherlands at the beginning o the 17t century, uisin glass lenses. Thay foond uise in terrestrial applications an astronomy.