1. The test particles were lost exponentially with a half life of 553 Myr. 2. That way the potential is independent from the test particle properties. 3. A stationary spacetime metric, making the orbit of a nearby test particle precess. 4. The easiest case for the application of a test particle arises in Newtonian gravity. 5. The Hamiltonian for test particle motion in Kerr spacetime is separable in Boyer Lindquist coordinates. 6. It is instructive to look at the total relativistic energy of a free test particle . 7. Calculations showed that when test particles were inserted into it, they flew away from each other. 8. Where m is the mass of a test particle moving with velocity \ vec { v }. 9. In fact, test particles do not accelerate toward massive objects in 2 + 1 dimensional general relativity. 10. We might mention here that in general, the motion of test particles in pp-wave spacetimes can exhibit chaos.
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