Q: basic observation of a star is how bright it appears. This brightness is known as the star's
A. absent magnitude.
B. apparent magnitude.
C. luminosity.
D. absolute magnitude
A: basic observation of a star is how bright it appears. This brightness is known as the star's C. luminosity. staff.on.br/jlkm/astron2e/AT_MEDIA/CH17/CHAP17AT.HTM?
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