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Stars
Beginning of paper
Magnitudes
The magnitude scale was invented by an ancient Greek astronomer named Hipparchus
in about 150 BC He ranked the he could see in terms of their brightness,
with 1 representing the brightest down to 6 representing the faintest. Modern
astronomy has extended this system to stars brighter than Hipparchus' 1st
magnitude stars and o .... Middle of paper
.... but a
magnitude difference of 5 has been set to exactly a factor of 100 in intensity.
Absolute magnitudes are how bright a star would appear from some standard
distance, arbitrarily set as 10 parsecs or about 32.6 light years. Stars can be
as bright as absolute magnitude -8 and as faint as absolute magnitude +16 or
fainter. There are thus (a very few) stars more than 100 times brighter than
Sirius, while hardly any are known fainter than Wolf 35 ....
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Number of words: 817
Number of pages: 3 (approx. 250 words per double-spaced page)
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