If gravity propagated between the Sun and the Earth at the same speed as visible light, the Earth would double the distance from the Sun in 1200 years...

All gravitational interactions between bodies in all dynamical systems had to be taken as instantaneous. . . . Indeed, as astronomers we were taught t...

yes, but this is fiction 😉

The zped creates a gravity field. Grav fields are ftl. therefore a spy drone with a zped could modulate the field, and you can insert info in the modu...