becasue scientist made a discovery of FMR
because xcvi was invented .......;;;;;;;;0000):)")PP)
The invention of the telescope is generally attributed to Hans Lippershey in 1608. The first practical telescopes were developed by Galileo Galilei in 1609. So, telescopes have been around for over 400 years.
we wouldn't know about any other planet besides the sun
Scientists have developed a number of radio, infrared, ultraviolet, and X-ray telescopes.
No, ancient Egyptian astronomers did not have telescopes. They relied on naked-eye observations of the sky and developed impressive astronomical knowledge and calendars based on these observations. Telescopes were not invented until much later in history.
Researchers use all of these: -- optical telescopes -- radio telescopes -- x-ray telescopes -- infra-red telescopes -- ultraviolet telescopes
Optical measures visible light, Radio measures electromagnetic radiation in that part of the spectrum corresponding to radio waves. Same with X-ray telescopes and x-rays. Optical is the kind you look through.
refracting
None of them. The first telescopes were developed in 1608 by three Dutch opticians. You may have been thinking of Galileo, who built his telescope based on their descriptions, and who may have been the first person to use a telescope to observe the stars. His observations of Jupiter the following year did revolutionize astronomy.
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).