Astronomy Lab #4 - Partners: Ben Watts, Ansy Ais Date...

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Partners: Ben Watts, Ansy Ais Date Performed: 10-4-07 Date due: 10-11-07 Lab #4: the Astronomical Telescope: II Introduction/Purpose: In 134 BC, Hipparchus made the first catalog of 850 stars and had a position and magnitude determined for each one. Magnitude is the brightness of the star and was then only visible through the naked eye until telescopes were created. The scale was from 1 to 6, and then Pogson revised the magnitude system by proposing that the magnitude scale be defined by making 5 magnitude steps. This lab acquaints the student with the magnitude system used by astronomers to describe how bright a star is. It also shows why telescopes are better to use than the naked eye when viewing stars and why large telescopes are better than smaller ones. Procedure: In this lab, we looked through a small telescope mounted on a stand to look at an illuminated target set up 3.5 meters from the telescope, all in a dark room. The illuminated target was a vertical row of 6 successively brighter stars. The focus was
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Astronomy Lab #4 - Partners: Ben Watts, Ansy Ais Date...

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