From the Greek tele which means far and skopein which implies to see, a telescope assists us to see the furthest of items. There are as many various telescopes as there are reasons to use them.
Parabola shaped radio antennae are called Radio Telescopes. They are constructed from large groups of dishes that are made from a conductive wire mesh. As of 2005, the selection sizes is many times bigger than the width of the Earth.
Optical telescopes focus light generally from the visible end of the Electromagnetic Spectrum. They can increase the size of far-off things in addition to their brightness. These scopes use mirrors or particular kinds of lenses to gather light and focus it. A fine example would be a set of binoculars.
X-ray or Gamma-Ray telescopes have rays that go through lots of glasses and metals. The mirrors associated with these scopes are usually parabolic in shape. Gamma-ray scopes don't even attempt to focus, they use a specific code to inform them what the shadows they are looking are. These scopes are normally found orbiting the earth.
Refracting telescopes are the ones that are most typical. They are usually constructed of a long tube that has a piece of glass at one end and the eyepiece at the other. These were used by sailors to see farther to the distance than would have been possible with the naked eye only.
Reflecting telescopes were established by Isaac Newton. Where refracting telescopes used a lens, showing telescopes utilized a mirror to catch light that was put in the very back of the telescope. These scopes provide a bigger view and brilliant large view of comets and star clusters.
Whether they be 50 feet away or in another galaxy, telescopes have been around since the 1600's to assist us in seeing the remarkable outer space all around us. There are as wide a range of telescopes as there are reasons to use them. Where refracting telescopes use a lens, reflecting telescopes utilize a mirror to catch light that was put in the back of the telescope.