TELESCOPE Light and other kinds of electromagnetic radiation coming from the universe outside the Earth must travel enormous distances through space and time to reach observers. Only the brightest and nearest stars can be seen with the unaided eye. To see farther and to clarify and measure what is seen, a telescope is needed. The word telescope is derived from the Greek words tele, "from afar," and skopos, "viewer." Even a simple homemade telescope can …showed first 75 words of 2473 total…

…showed last 75 words of 2473 total…the Newtonian reflector, and, that same year in France, N. Cassegrain designed and built the Cassegrain reflector. The telescope is one of the greatest inventions of all time. They have helped us understand the planets around us and the planets beyond. In the years to come, we will see things that we thought could only be since fiction. Below are just a few of the many things that we can see with this marvelous invention