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Explain cosmic acceleration? First, correct Einstein
Homer G. Ellis
In creating his gravitational field equations Einstein unjustifiedly assumed that inertial mass, and its energy equivalent, is a source of gravity. Denying this assumption allows m…
The warp drive and antigravity
Homer G. Ellis
The warp drive envisioned by Alcubierre that can move a spaceship faster than light can, with modification, levitate it as if it were lighter than light, even allow it to go below…
An expanding universe of spinning spheres
Homer G. Ellis
A novel but elementary geometric construction produces on the seven-dimensional manifold of rotated spheres in Euclidean three-space a finslerian geometry whose geodesics are inter…
Leptons might not generate gravity
Homer G. Ellis
A simple thought experiment suggests that, contrary to assertions in an earlier Letter, constancy across materials of the ratio of active to passive gravitational mass does not rul…
Space-Time--Time
Homer G. Ellis
Space-time--time is a natural hybrid of Kaluza's five-dimensional geometry and Weyl's conformal space-time geometry. Translations along the secondary time dimension produce the ele…
Space-Time--Time: Five-dimensional Kaluza--Weyl Space
Homer G. Ellis
Space-time--time couples Kaluza's five-dimensional geometry with Weyl's conformal space-time geometry to produce an extension that goes beyond what either of those theories can ach…