-
Kitt Peak National Observatory -
reflecting and refracting telescopes -
refracting telescope -
refracting telescope -
reflecting telescope -
Cassegrain reflector -
chromatic aberration -
Victor M. Blanco Telescope -
Palomar Observatory -
Keck I telescope -
Subaru Telescope -
Hubble Space Telescope -
Jupiter -
gamma-ray detector -
radio telescope -
Arecibo radio telescope -
Expanded Very Large Array -
radio telescope -
James Clerk Maxwell Telescope -
Galileo's telescopes -
Gregorian telescope -
Newton's reflecting telescope