Since we know that it isn’t constant with time, how can we be sure that it is constant with space? This might be a reason the variability in our measurements which seem to disagree.

Put another way, why couldn’t the universe expand in one direction preferentially compared to another?

  • Gork@lemm.eeOPEnglish
    5·
    11 months ago

    That makes sense, but how would we then be able to distinguish how much of the redshift is due to the metric expansion of space and how much is due to their velocity vector component in that direction?

      • Gork@lemm.eeOPEnglish
        3·
        11 months ago

        Right, but the velocity component would still be present in some form due to the gravitational attraction between bodies. I don’t know how significant this would be compared to the redshift value from the initial kick from inflation, or if it is possible to separate the two components somehow.

          • Gork@lemm.eeOPEnglish
            2·
            11 months ago

            Wow. So it’s like that adage. However big you think space is, it’s much bigger than that.

            It’s hard to fathom scales at which being gravitationally bound is insignificant relative to those type of effects.