This lesson provides a quick introduction into telescopes and some key terms to understanding their operation.
Most of the universe cannot be seen with the Mark-1 eyeball as the human eye is unable to see very faint objects with few notable exceptions: Galaxies (except Andromeda), 2 Planets (Uranus, Neptune), and Spectra.
Telescopes allow us to probe the Universe through a variety of different “eyes” that provide a greater understanding than is possible with just our eyes
