How real is the multiverse?


Oct 22, 2019
An interesting and easy reading report here. Some sections reminded me of past episodes of Star Trek or Star Gate or Star Gate Atlantis where people pop into some other, parallel universe and encounter different versions of themselves. Today, the Hubble constant is in a period of controversary, again. No Release for the Hubble Tension - Sky & Telescope - Sky & Telescope (

H0 values now range 68 to 74 km/s/Mpc depending upon methods used. Those rates can be converted into c.g.s. units of expansion speed and expressed as cm/s/cm. Very tiny rates compared to eternal inflation where the inflation epoch features 3D space expanding 10^20 greater than c velocity or more. Eternal inflation and inflation requires a universe with a very different vacuum energy density compared to the present too and perhaps other universes with very different vacuum energy densities. Other reports I read indicate the multiverse has at least 10^500 different universes.


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