7 ms·
Doesn't GR conserve local momentum by construction? Since Spacetime is a Lorentzian manifold, the metric is always locally translation invariant.
by widdma 11y ago
Doesn't GR conserve local momentum by construction? Since Spacetime is a Lorentzian manifold, the metric is always locally translation invariant.
- yk 11y agoYes, up to first order. ( So it seems implausible that a rather small EM thruster would provide trust, but the thing is already implausible in the first place.)