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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
The period-luminosity relation for Cepheid variables was discovered in 1908 by:
A) Harlow Shapley.
B) Heber Curtiss.
C) Henrietta Leavitt.
D) Edwin Hubble.
E) William Herschel.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
Read 183 times
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
This astronomy class is killing me, thanks for chiming in and answering
Minoring in physics
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#3
8 years ago
Happy to help Slight Smile
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