(Some versions of the story have the apple falling and hitting poor Newton on the head ... opposes acceleration due to ...

An apple falling from a tree inspired Newton to create his theory of gravity, first published in his book 'Principia' in 1687. On Earth, gravity gives weight to physical objects and pulls them ...

Besides quantum theory, general relativity is one of two pillars of modern physics – our working theory of gravity and of ... earlier by Galileo: that falling objects accelerated at the same ...

Gravity is everywhere: pulling at your feet, holding satellites in orbit, and making the Earth spin around the sun. Yet, for ...

Newton’s theory of universal gravitation says that every particle in the universe attracts every other particle through the force of gravity. The theory helps us predict how objects as large as ...