I don’t see a need for isotropy of the Universe. We may very well live on the edge of the World.
But experimentally, the Universe doesn’t look anisotropic on large scales.
Oh, yes, it looks! Big Bang only 14 billion years away, the end many trillion or so years away.
A very asymmetric situation, indeed.
I meant isotropic in space, not in time.
It’s not a need but a probability issue. We may indeed live on the edge of the World, it’s just surprising because the edge of the world is much smaller than the rest of it.
I don’t see a need for isotropy of the Universe. We may very well live on the edge of the World.
But experimentally, the Universe doesn’t look anisotropic on large scales.
Oh, yes, it looks! Big Bang only 14 billion years away, the end many trillion or so years away.
A very asymmetric situation, indeed.
I meant isotropic in space, not in time.
It’s not a need but a probability issue. We may indeed live on the edge of the World, it’s just surprising because the edge of the world is much smaller than the rest of it.