Telescopes are instruments used to observe remote objects and the collection of electromagnetic radiation. The telescope was invented in Telescope comes form the two Greek words, tele meaning far and skopein meaning far-seeing. Telescopes came into being when scientists discovered the property of light. The basics behind the telescope are the ability of a lens to redirect light to a desired particular point. Telescope have discovered three of the faintest and smallest objects ever detected beyond Neptune. Each lump of ice and rock is roughly the size of Philadelphia and orbits just beyond Neptune and Pluto, where they may have rested since the formation of the solar system 4.5 billion years ago Hubble has been used to make some very important scientific discoveries, such as the acceleration of the universes expansion. Hubble has also helped to discover the presence of black holes at the centers of nearly all galaxies. Spitzer has been used to find some of the most distant galaxies in the universe, and has also made the first detections of light from planets around other stars There is a Astronomical Telescope that makes use of two positive lenses: the objective, which forms the image of a distant object at its focal length, and the eyepiece, which acts as a simple magnifier with which to view the image formed by the objective. Astronomical Telescopes use digital cameras to produce digital images. Telescopes are used in astronomy to see the stars, planets etc.. telescopes-in-space/telescopes-in-space/