There are tons of reasons why number one is to expand the knowledge of Earth to else where in the universe. The hubble telescope in orbit has said to see so far that the view of stars are no longer visible. Also that same telescope can see in different views such as infarred, radio waves, optical and no human can ever come close to what a telescope can offer. It is also a defense mechanism it would let us know that there is an approaching comet and/or asteroid that could hit Earth in the next few years. It gives us the ability to see where we thought we never could go. with out the telescope we would think the world would be flat it gave us the knowledge about the importance of surrounding stars, planets, black holes and so on. That one day if we ever had to leave Earth because it was to dangerous and find another planet we could live on it would all start with the telescope.
lenses
because he explore telescopes
Galileo Galilei
We can see more stuff.
cus they ar IN IT BLOOD
Researchers use all of these: -- optical telescopes -- radio telescopes -- x-ray telescopes -- infra-red telescopes -- ultraviolet telescopes
nothing
refracting
Well, the diameter of the Earth would be a quite irrevocable pragmatic limit.
No they are not bigger then radio telescopes at all.
Radio telescopes collect radio waves. Optical telescopes capture visible light waves.
Ground-based telescopes, and space telescopes. Or: refracting telescopes (main collector is a lens), and reflecting telescopes (main collector is a mirror). Or: Home telescopes (small ones), and professional ones (larger and more expensive).