Most Luminous Stars
Luminosity, Star, Absolute magnitude
978-613-7-18252-9
6137182525
92
2011-09-30
34.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The distance d to the star must be known, to convert apparent to absolute magnitude. Absolute magnitude is the apparent magnitude a star would have if it were 10 parsecs away from the viewer. Since apparent brightness decreases as the square of the distance (ie, as 1/d2), a small error (eg, 10%) in determining d implies an error ~2× as large (thus 20%) in luminosity. Stellar distances are only directly measured accurately out to d ~1000 lt-yrs.
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