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/sci/ - Science & Math

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15277607 No.15277607 [Reply] [Original]

if the cosmic background radiation is the basic rest frame of the universe and the earth has this enormous peculiar motion relative to the background radiation (.0012c or 368km/s) then why is the hubble constant observed to be the same in every direction? edwin hubble discovered his observed distance-velocity relationship before the background radiation was even known to exist

>> No.15277638

The Hubble constant is roughly 70 km/s per megaparsec (3.26 light years). Once you start measuring distances that are in billions of light years the error because of our relative motion is essentially zero.

>> No.15277675 [DELETED] 
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15277675

>>15277638
>megaparsec (3.26 light years)

>> No.15277701
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15277701

>>15277675
> 3.26m
oh no, an autocorrect typo. I'm sooooo embarrassed.

>> No.15278365 [DELETED] 

>>15277638
the earth's peculiar motion is more than 25% of the virgo cluster's recession velocity, the virgo cluster is 5mpc further away when measured by cepheid variables than it is by the hubble relationship.
>the error are insignificant because i am too lazy and sloppy to consider them