The Internet Time Travel Database
Einstein showed that gravity is only a manifestation of mass, a curvature of the
space-time continuum caused by the presense of mass. No mass, no gravity. Time is
similar—it passes only in relationship to. . . stuff. Each
astronomical object, each planet, has a single achievable time transfer influenced
by—and that can be calculated from—net local gravitation effects. That interval
depends on its own mass, its sun’s, and the galaxy’s.
1 English variant