Fringe physics

hypothetical type of nuclear reaction

thumb|Artistic depiction of a fictional anti-gravity vehicle

hypothetical object whose Schwarzschild radius is approximately the same as its Compton wavelength

The EmDrive is a controversial device first proposed in 2001, purported by its inventors to be a reactionless drive. While no mechanism for operation was proposed, this would violate the law of conservation of momentum and other laws of physics. The concept has at times been referred to as a resonant cavity thruster. The idea is generally considered by physicists to be pseudoscience.

thumb|A diagram comparing the structure of a classical black hole with a gravastar.

class of hypothetical redshift mechanisms

German physicist (1925–2001)

fictional technological device

claimed cold fusion reactor

theoretical weapon

hypothetical vehicle deriving energy from water

overview about the criticism of the theory of relativity

any physical cosmological model of the universe that was, or still is, proposed as an alternative to the then-current standard model of cosmology

object composed of dark energy that outwardly resembles a black hole

Alleged anomalous behavior of pendulums or gravimeters

compact object with an intrinsic magnetic field that collapses continuously without forming an event horizon

fringe theory claiming to unify quantum mechanics and general relativity

hypothetical process of shielding an object from the influence of a gravitational field

book by Robert L. Park