Gravity
Wiki, Facts

 Gravity facts

• Since energy and mass are equivalent, all forms of energy, including light, also cause gravitation and are under the influence of it
• On Earth, gravity gives weight to physical objects and causes the ocean tides
• The gravitational attraction of the original gaseous matter present in the Universe caused it to begin coalescing, forming stars — and the stars to group together into galaxies — so gravity is responsible for many of the large scale structures in the Universe
• Gravity has an infinite range, although its effects become increasingly weaker on farther objects
• Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass/energy
• The most extreme example of this curvature of spacetime is a black hole, from which nothing can escape once past its event horizon, not even light
• More gravity results in gravitational time dilation, where time lapses more slowly at a lower (stronger) gravitational potential
• However, for most applications, gravity is well approximated by Newton's law of universal gravitation, which postulates that gravity causes a force where two bodies of mass are directly drawn (or 'attracted') to each other according to a mathematical relationship, where the attractive force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
• Gravity is the weakest of the four fundamental interactions of nature
• The gravitational attraction is approximately 1038 times weaker than the strong force, 1036 times weaker than the electromagnetic force and 1029 times weaker than the weak force