A star with a radius between 10 and 100 times that of the sun. Globular clusters are distributed in the halos around the Milky Way and other galaxies. Grand Unified Theories Theories which describe the behavior of the single force that results from unification of the strong, weak, and electromagnetic forces in the early universe. The strength of the gravitational field decreases as the square of the distance. A prediction of Einstein's general theory of relativity.
Photons lose energy as they escape the gravitational field of a massive object.
Because a photon's energy is proportional to its frequency, a photon that loses energy suffers a decrease in frequency, or redshift, in wavelength. The attractive effect that any massive object has on all other massive objects. The greater the mass of the object, the stronger is its gravitational pull. The gravitational analog of an electromagnetic wave whereby gravitational radiation is emitted at the speed of light from any mass that undergoes rapid acceleration. The lowest energy state that an electron can have within an atom.