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27. Natural Reality / A. Classical Physics / 1. Mechanics / d. Gravity

[weak long-range force attracting objects]

5 ideas
Newton showed that falling to earth and orbiting the sun are essentially the same [Newton, by Ellis]
Gravity isn't a force, because it produces effects without diminishing [Mayer]
Newton is a special case of Einstein's general theory, with an infinite speed of light [Einstein, by Close]
Instead of gravitational force, we now have a pervasive gravitational field [Farmelo]
Gravity is unusual, in that it always attracts and never repels [New Sci.]