Which two types of objects are explicitly mentioned as being used as 'standard candles' for local measurement of $H_0$?

Answer

Cepheid variable stars and Type Ia supernovae

Standard candles, objects with known intrinsic brightness used to calculate distance, include Cepheid variable stars and Type Ia supernovae in the context of measuring the local expansion rate.

Which two types of objects are explicitly mentioned as being used as 'standard candles' for local measurement of $H_0$?

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