@j_bettany ·
@j_bettany - 23 Jun 2022
Contrary to Sagan's 'billions and billions' of galaxies remark, estimates now put the number of galaxies in the observable universe at between 6 and 20 trillion.
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@j_bettany ·
Contrary to Sagan's 'billions and billions' of galaxies remark, estimates now put the number of galaxies in the observable universe at between 6 and 20 trillion.