So far, we have discussed telescopes for visible light. There are telescopes for radio waves, infrared, X-rays and gamma rays. They can be ground based or orbiting around the Earth. One advantage of the space telescopes is that they will not be affected by the atmosphere, e.g., weather or turbulence. The following is a photo of the largest (in term of collecting area) radio wave telescope, Arecibo, suspended over a valley in Puerto Rico with a diameter of 300 m.