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Where is the CMB cold spot seen in the sky?

Quick Answer

The Cosmic Microwave Background cold spot appears in the direction of the constellation Eridanus.

The Full Story

The CMB cold spot is a large region of slightly lower temperature in the cosmic microwave background, the afterglow of the Big Bang. It lies in the direction of the constellation Eridanus. Scientists have studied it closely because it seems larger and colder than simple models easily explain, though its significance is still debated. It is not a hole in space, but a pattern in ancient radiation mapped across the whole sky.

Key Facts

1.Seen in the direction of Eridanus
2.Part of the cosmic microwave background
3.CMB temperature variations are tiny, at microkelvin levels

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Suggested video title for this topic:

"One strange patch in the oldest light in the universe still puzzles astronomers."

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