9. Two stars are identified on the Hertzsprung-Russell diagram below. Star 1 is hotter and brighter than Star 2.
Hertzsprung-Russell Diagram
Temperature
(K)
40,000 20,000 10,000 7,500 5,500 4,500 3,000
10"
Star 1 is cooler and less bright than Star 2.
о o
20*
Star 1 is hotter and less bright than Star 2.
20 Die
10'
O
Star 1 is cooler and brighter than Star 2.
1
10
CLEAR ALL
10
O
B
K
M
А
G
Spectral Class
Based on this diagram, how do the characteristics of Star 1 and Star 2
compare?
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