Recent content by stoper

  1. S

    @berkeman is now following me :)

    @berkeman is now following me :)
    • stoper
    • Profile post
  2. S

    B Why do we use expanding metric?

    Scale factor.
  3. S

    B Why do we use expanding metric?

    Being material observers, we do not expand with the universe. Our ruler for measuring its increasing size does not expand either - its scale does not change. If I identify the ruler with a metric, then from my perspective it should be invariant both spatially and temporally. If it expanded with...