- #1
mrspeedybob
- 869
- 65
Suppose two massive bodies are far enough apart that the expansion of space precisely counteracts their gravitational attraction. While in this configuration a tether is strung between them, tied off to body A and wound around a pulley on body B. One of the bodies is then nudged so that the distance between them increases. At this point the expansion of space is greater then the force of gravity and so the two bodies move apart. As they do so the tether unwinds from the pulley on body B and turns a generator. This action would obviously slow the rate at which the bodies diverge but the point is that energy is being extracted from the expansion of space. Where does this energy come from? Is it possible that the energy source which gave rise to the big bang is still adding energy to our universe?