Advised by: Mr. Todd Duncan, Mr. Al Harper, and Ms. Chicha Tenner
There are many ways that you can measure the brightness of stars. You can use eyes to measure the brightness, but in our project we used a more accurate device called a Photoelectric Photometer. This device converts the light that we see into electricity. In experiment we learned how our eyes respond to light of different brightness.
We also made comparisions of the brightness of different stars determining how much energy we received from them. The experiment was done and we came out with accurate results.
There are two types of magnitudes, apparent and absolute magnitude. Apparent magnitude is how an bright object appears to an earth based observer. Apparent magnitude does not tell you the actual brigtness.
Absolute magnitude is the apparent magnitude that a star would have if it were located at a distance of exactly ten porsecs from the earth.
Luminosity is related to absolute magnitude, it's the amount of energy escaping from a star's surface each second.
Because of a cloudy night we were only able to see the Moon, Jupiter, and the Summer Triangle for a short period of time. Out of these heavenly bodies we discovered that Jupiter had an higher magnitude than deneb. We also learned that because the moon's light was so bright that the photometer did shut off as suggested. Although the class was short and the clouds kept playing peek-a-boo with us, we enjoyed and learned alot about photometry.
WHAT IS PHOTOMETRY ? Photometry is measuring of the brightness of stars.
WHAT IS LUMINOSITY ? Luminosity is the amount of energy escaping from a star's surface each second.
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