This astronomer catalogued the spectral classes of stars: O, B, A, F, G, K, M.
Cannon
What kind of star is Rigel?
blue giant
Ad
From the diagram above what is the designation of Betelgeuse?
Red Giant
According to the diagram above, what kind of star is Barnard's Star?
red dwarf
According to the diagram, what kind of star is Sirius B?
white dwarf
According to the diagram, what is the sun's spectral class?
G
According to the diagram, where on the main sequence are the brightest, hottest stars?
upper left
If Jupiter is 500 million miles from the sun and Saturn is 1 billion miles from the sun, how much
sunlight does Saturn get compared to Jupiter?
Saturn gets one-fourth the light that Jupiter gets.
If the stars Sirius and Luyten 726-8A are the same distance away, but Sirius has an apparent
magnitude of -1.46 and Luyten 726-8A has an apparent magnitude of 12.54, then -
Sirius' absolute magnitude is much greater than Luyten 726 -8A's.
