Astronomy 101 Telescopes.

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Presentation transcript:

Astronomy 101 Telescopes

Telescopes Refractor Newtonian Compound Reflector

Refractor telescope

Newtonian Telescope

Cassegrain telescope

Eyepieces

Best beginner telescope Pair of Binoculars Tripod Binocular adaptor Cheap, reusable, and great for a beginner.

Image orientation Binoculars 4 elements Correct orientation Newtonian telescope 3 elements, Backwards Refractor telescope 2 elements, Upside-Down Diagonals can be used to correct this.

Finder scopes

How to use a finder scope Magnifying finder scope Use the “two eye” method – Keep both eyes open, the object rises in one and falls in the other. Non Magnifying finder scope (Telrad) Put the object in the middle circle Look in a low power eyepiece.

Next talk Computing Magnification. Field of view Stellar magnitudes Star colors Types of objects to look for Messier catalog

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