In article ,
writes:
detailed measurement of the CMB temperature up to
the 9-th or 10-th place after the dot?

As someone mentioned, this is far beyond any technology we can
conceive today.

...should we expect CMB heating up rather and NOT cooling

Observations of CN line ratios in distant galaxies indicate that the
microwave background was hotter in the past than it is now.

--
Steve Willner Phone 617-495-7123
Cambridge, MA 02138 USA
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