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Nittany CurrentLancaster: Amish Country, historic downtown

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Community

What is a blue shift, and is one happening now?

David Robinson
Reporter · Wednesday, November 4, 2026 at 3:54 AM · 1 min read
What is a blue shift, and is one happening now? — Lancaster Community news

Blue shift? Red mirage? What are they, and how will we know when one is happening?

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