Assuming matter is more or less uniformly distributed in the Universe, what would be the net gravitational force acting on an Earth-like, but orphan*, planeta stationary (from the reference frame of the Universe as a whole) lump of matter, from the rest of the Universe in these cases?
- The Universe is infinite,
- The Universe is finite and spherical, but the planetobject is not at its centre
*orphan planet: not gravitationally bound to a solar system.
I am asking because neither of my naïve results seem to be matching observations.make sense:
- Infinite Universe: ∞ forces of opposite directions, each cancelling out?
- Finite Universe: significant amount of all matter accelerating towards the centre of mass