What Makes White-Dwarf Supernovae Good Standard Candles

question 72

Multiple Choice

What makes white-dwarf supernovae good standard candles?

• A)They are very bright,so they can be used to determine the distances to galaxies billions of light-years away.
• B)They should all have approximately the same luminosity.
• C)They occur so frequently that we can use them to measure the distances to virtually all galaxies.
• D)We have had several occur close to us in the Milky Way,so we have been able to determine their luminosities very accurately.
• E)both A and B

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