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Gravity Force happened in 1989.
Gravity Crash happened in 2009.
Gravity Rush happened in 2012.
There's no known reason why anything should happen to Earth's gravity, and nothing is expected to.
The sun doesn't have to do anything special for this to happen; the sun is at the center by definition, Its intense gravity keeps the planets and other orbiting materials in their orbits.
It will never happen because the earth's gravity is caused by it's mass and it's density.
The Adventures of Rad Gravity happened in 1990.
All the objects will float if there will be no gravity. Gravity is the earth's pull on objects.
Rapidly, almost continuously.
If the earth had no gravity it follows that gravity would be absent from any mass. In the absence of gravity life would not exist.
If there was no gravity, the Sun and and the planets would never have formed.
Professor Heinz Wolff's Gravity happened in 2008.