Stephen,Popular 365 Question

The current cosmic microwave background is 3K, will it become 2K, 1K or even extremely near to 0K in the future?

9 months ago 5


  1. Mark G

    Yes. It's actually 2.7K it was, originally 10,000K. As the Universe has expanded the CMB has been spread out. This will continue, although it will be never 0K, that is impossible.

  2. Nyx

    Yup. At 0K, that's when the heat death of the universe occurs.

  3. quantumclaustrophobe

    It's predicted that as time goes on, the CMBR will get colder, yes.

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