Some of the hardest questions in cosmology begin where the usual math gives up. Push Einstein’s theory far enough back toward ...

Scalar fields play a central role in modern gravitational theory, acting as simple yet powerful agents that couple to spacetime curvature and influence the formation and evolution of compact objects.

Interplanetary missions depend critically on precise understanding of gravitational interactions among spacecraft, planets and minor bodies. Trajectory design typically employs a perturbed Newtonian ...