Everything else. Or anything else, if you select a single quark (presuming we don’t split a quark).
If everything is moving away from us, then everything is moving away from everything else.
It’s just that some things are moving away from us faster than they are moving away from other things
But what frame of reference?
Everything else. Or anything else, if you select a single quark (presuming we don’t split a quark).
If everything is moving away from us, then everything is moving away from everything else.
It’s just that some things are moving away from us faster than they are moving away from other things