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Why are Cepheid variable stars so important to astronomers?
Different
Not the same as another or each other; unlike in nature, form, or quality.
Rich
Having an abundance of wealth, resources, or valuable possessions.
Halo Effect
A cognitive bias in which an observer's overall impression of a person, company, brand, or product influences the observer's feelings and thoughts about that entity's character or properties.
Primacy Effect
The tendency for individuals to remember items at the beginning of a list better than items in the middle or at the end.
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