Historical+Telescopes

=Historical Telescopes=

"The telescope was one of the central instruments of what has been called the Scientific Revolution of the seventeenth century." Telescopes were the first extensions of vision. The telescope allowed scientist to understand the planets and the universe better. flat

= Galilean Telescope =



The Galilean telescope was made by Galileo Galilei in 1609. The telescope is made up of a convex lens and a concave lens. The objective lens was convex and the eyepiece was concave. The telescope provided upright images. The best Galilean Telescope magnified 30x. The field of view is tiny, but the telescope could view craters on the moon, four moons that orbit Jupiter, and the phases of Venus.

= Keplerian Telescope =

The Keplerian telescope was made by Johannes Kepler in 1611. Its original idea was from the Galilean was the image was inverted. It also has better magnification then the Galilean telescope, but it uses two convex lens for the eyepeice. This helped give a wider feild of view, but the problem

= Galilean vs Keplerian Telescope =

The Galilean telescope and the Keplerian telescope have there advantages and disadvantages. The Keplerian telescope can see farther then the Galilean telescope and it was a wider field of view, but the Keplerian telescope has a upside down image while the Galilean telescope has it upright.

=Telescope Improvements= After the Galilean and Keplerian Telescopes the Telescopes improved a lot. They used different techniques to magnify images, such as, reflection, radio, x-ray,

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