Telescopes
- Type
- Telescopes
- Types of Refracting
- Keplerian, Galilean
- Types of Reflecting
- Gregorian, Newtonian, Cassegrain, Ritchey–Chrétien
- First Known Telescope
- 1608, Hans Lipperhey
- Largest
- 34 ft 1 inch, Gran Telescopio Canarias
- Telescopes are the main way in which we can observe the planets and stars up close, allowing us to magnify the light from them so we can see a larger and clearer image.
- Telescopes have been around for over 400 years since Hans Lipperhey constructed the first known refracting telescope.
- Draw a diagram of how the light works in a telescope.
- The word "telescope" was coined in 1611 by the Greek mathematician Giovanni Demisiani for one of Galileo Galilei's instruments presented at a banquet at the Accademia dei Lincei.
- Refracting telescopes use multiple lenses to magnify the light for the observer.
- Reflecting telescopes use use a main mirror and lenses magnify the light for the observer.
- The most large and most professional telescopes are reflecting telescopes, using the Ritchey–Chrétien design.
