4 ms·
Why couldn't a relatively nearby galaxy recede from us faster than a more distant one due to causes beyond the limits of our observation? I'm thinking primarily
by gradschool 4y ago
Why couldn't a relatively nearby galaxy recede from us faster than a
more distant one due to causes beyond the limits of our observation?
I'm thinking primarily of gravitational attraction to a massive object
past the boundary of our observable universe, but wouldn't dark matter
also imply in any case that all bets are off? What objection could
anyone raise to the idea of a big load of dark matter right next to
some galaxy making it recede faster?
- magicalhippo 4y agoThe recession speed is a statistical average given the distance. Individual galaxies might vary some, but the trend is clear. At these extreme distances, I'm pretty sure any motion due to the local (to the distant galaxy) gravitational field is negligible to the perceived recession due to the expansion of the universe[1]. [1]: https://en.wikipedia.org/wiki/Hubble%27s_law https://en.wikipedia.org/wiki/Hubble%27s_law