p18 - SPACE SPACE A star(our sun)is part of a galaxy A...

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Unformatted text preview: SPACE SPACE A star (our sun )is part of a galaxy. A planet (earth) orbits a star. A moon (our moon) orbits a planet (earth) SPACE SPACE distance travelled by light in a year. It takes light from the sun 8 minutes to get to the earth. One light year is the SPACE SPACE It takes 4 light years for light to reach the nearest star (alpha centauri) It takes light 100,000 light years to get to the edge of our galaxy. SPACE SPACE There are two types of telescope ,the refractor and the reflector. SPACE SPACE The refractor works by light bending or refracting. The reflector works by light reflecting. The refracting telescope consists of two convex lenses. The objective lens collects light from distant objects such as planets and stars. It forms an image of them. The eyepiece lens then magnifies this image. The Refracting Telescope The Refracting Telescope SPACE SPACE SPACE SPACE Use can be made of light ,radio and micro waves from the electromagnetic spectrum. SPACE SPACE Radio waves are detected by large curved dishes similar to the dish aerials in T.V. systems ...
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This note was uploaded on 02/12/2011 for the course PHY 2004 taught by Professor Staff during the Spring '08 term at University of Florida.

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