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High School Electives
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Astronomy
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Galaxy Distances and Redshifts
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Astronomy
AST.231 Galaxy Distances and Redshifts
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Why do astronomers often say Cepheid distances help calibrate farther distance methods such as Type Ia supernovae?
A
Cepheids replace the need to observe supernova brightness.
B
Cepheids are used only after redshift has failed for quasars.
C
Cepheids in nearby supernova host galaxies help set the supernova luminosity scale.
D
Cepheids make distant galaxies stop expanding.
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