ocalhoun

Suppose for a moment, that particles exist with 'negative' gravity. They would be repelled from sources of 'positive' gravity, and also repelled from each other, in the reverse of ordinary gravity.

Think about it, where would you expect to find such particles? Grouped together? Of course not. On a planet's surface, or near any gravity well? Certainly not!

They would immediately shoot off into space, repelled from any source of 'positive' gravity, and from each other. They would end up in the emptiest regions of deep space, as thinly spread as possible, and always expanding. The cumulative pressure they exerted on the clumped masses of positive gravity matter would cause everything to expand away from everything else... at an accelerating rate!

Think about it, where would you expect to find such particles? Grouped together? Of course not. On a planet's surface, or near any gravity well? Certainly not!

They would immediately shoot off into space, repelled from any source of 'positive' gravity, and from each other. They would end up in the emptiest regions of deep space, as thinly spread as possible, and always expanding. The cumulative pressure they exerted on the clumped masses of positive gravity matter would cause everything to expand away from everything else... at an accelerating rate!