Recent content by physics2222

You can kind of treat Earth as an idealized point particle where the mass is concentrated at the center and the potential (metric) is a function of the radius R. There are mass anomalies that change the field but those are negligible compared to the change in field strength you would get at from...

Not sure but I think the OP is referring to generating negative curvature behind the craft to push it. This would need some negative energy density. At least this is similar to the "Alcubierre drive."