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Plot of the Cosmic Microwave Background spectrum from the FIRAS instrument on the COBE satellite. An ideal blackbody curve slices cleanly through the data points and bisects each set of error bars.

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https://files.mastodon.social/media_attachments/files/112/038/289/579/590/789/original/1e5947ceb871b888.jpeg

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  1. Robert McNees (mcnees@mastodon.social)'s status on Monday, 04-Mar-2024 16:10:33 UTC Robert McNees Robert McNees
    in reply to

    Among the results established in Tolman's book, he shows that blackbody radiation cools but remains thermal as the universe expands. This anticipates the Cosmic Microwave Background, the most precise blackbody spectrum ever measured!

    Figure: Ned Wright (https://www.astro.ucla.edu/~wright/cosmo_01.htm)

    In conversation about 10 months ago from mastodon.social permalink
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