The gravitational field on Earth varies not only with latitude, but also with altitude and in other ways, particularly due to crustal thickness and the fact that the Earth's crust effectively floats ...

Scalar field cosmology employs techniques from dynamical systems theory to elucidate the qualitative evolution of the Universe driven by one or more scalar fields. By casting the cosmological ...

Scalar-tensor gravity represents a class of extensions to Einstein’s theory of general relativity in which the gravitational interaction is mediated not only by the spacetime metric but also by one or ...

EMDrives are claimed to be propellentless space propulsion systems. If propellentless propulsion is possible it could enable fast human travel throughout the solar system and possible interstellar ...