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EXAM TWO
CHAPTER 17,
43
Astronomy
Undergraduate 1
10/22/2009
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Term
17-absolute magnitude
 Definition
the apparent magnitude that a star would have if it were at a distance of 10 parsecs.
Term
17-apparent brightness
 Definition
the flux of a star's light arriving at the earth.
Term
17-apparent magnitude
 Definition
Term
17-binary stary
 Definition
two stars orbiting each other
Term
17-brown dwarf
 Definition
Term
17-center of mass
 Definition
Term
17-color ratio
 Definition
Term
17-distance modulus
 Definition
Term
17-double star
 Definition
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17-eclipsing binary
 Definition
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17-giant
 Definition
Term
17-Hertzsprung-Russell (H-R)
 Definition
Term
17-inverse-square law
 Definition
Term
17-light curve
 Definition
Term
17-luminosity
 Definition
Term
17-luminosity class
 Definition
Term
17-luminosity function
 Definition
Term
17-magnitude scale
 Definition
Term
17-main sequence
 Definition
Term
17-main sequence star
 Definition
Term
17-mass-luminosity relation
 Definition
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17-metal
 Definition
Term
17-OBAFGKM
 Definition
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17-optical double star
 Definition
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17-parallax
 Definition
Term
17-parsec (pc)
 Definition
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17-photometry
 Definition
Term
17-proper motion
 Definition
Term
17-radial velocity
 Definition
Term
17-radial velocity curve
 Definition
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17-red giant
 Definition
Term
17-space velocity
 Definition
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17-spectral class
 Definition
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17-spectral type
 Definition
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17-spectroscopic binary
 Definition
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17-spectroscopic parallax
 Definition
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17-spectrum binary
 Definition
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17-stellar parallax
 Definition
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17-supergiant
 Definition
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17-tangential velocity
 Definition
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17-UBV photometry
 Definition
Term
17-visual binary
 Definition
Term
17-white dwarf
 Definition
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