Have astronomers ever observed a violet shift like they have blue

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Ahh… petah? : r/PeterExplainsTheJoke

Have astronomers ever observed a violet shift like they have blue

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天文学家曾观测到红移和蓝移，那么是否存在可观测的

How is the blackbody spectrum red/blue-shifted? - Quora

Does the red shift from distant galaxies tell us that the universe