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In General

• What are variable stars? Name some different types.
• What kind of star is Mira?
• What kind of stars are RR Lyrae stars?

Cepheid Variables

• What kind of stars are Cepheids?
• What kind of star is Polaris?
• Why does the light from Cepheid variable stars change in time?
• How frequently does the luminosity of Cepheid variable stars change?
• What property of a Cepheid variable can be used to find its luminosity?
• Why are Cepheid variable stars useful?
• How do we use Cepheid variables in determining distances?