It gives an upright image of the distant object. Galilean Telescope: The Galilean telescope was designed by the great Italian scientist Galileo Galilei in 1609. Let’s have a look at the types of refracting telescope used in the earlier times: It forms a clearer and brighter image of the object to the viewer. Refracting telescopes, also known as refractors, use a lens as their objective to form an image. The big lens collects the light from the source while the small lens brings the image of that object to our eyes. Telescopes usually work by collecting and focussing light from the night sky with the help of curved mirrors or lenses. The first and foremost purpose of a telescope is to provide graphical representations of distant objects. Telescopes are used by both professionals and non-professionals for observing celestial objects.Īn instrument known as Hubble Space Telescope (HST), which was located in the earth’s orbit, is the best-known optical telescope that collected data for the deep universe. It is said that people in ancient India used telescope-like instruments for observing celestial objects and that was about 900 years ago.Ī telescope is an optical instrument consisting of a particular arrangement of curved mirrors and lenses in such a way to make faraway objects appear nearer.įor Observing Celestial Bodies From Earth’s Surface As a result, scientists started inventing different tools for observing celestial objects, and the telescope is one of them.
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