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A comment on Dark Matter Is an Illusion, New Antigravity Theory Says. Parent comment

Re:Dark Matter Is an Illusion, New Antigravity Theory Says by 127 on Saturday September 03, 2011 @11:44PM (#2958757)
One thing I don't understand: wasn't there just discovered a ring of antimatter circling around the Earth? Wouldn't it just disperse into space if antimatter caused antigravity? Stupid question, I know, but just something that's beyond my comprehension.
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Re:Dark Matter Is an Illusion, New Antigravity Theory Says by fhars on Sunday September 04, 2011 @06:47AM (#2959195)
No, those are charged particles interacting with the magnetic field of the earth. Gravity is such a ridiculously weak force that you can safely ignore it in situations like that.
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Re:Dark Matter Is an Illusion, New Antigravity Theory Says by hollerith on Sunday September 04, 2011 @08:37AM (#2959303)
Tiny amounts of antimatter were just discovered circling around Earth. The anti-grav effect on the antimatter particles is swamped by the effects of the Earth's gravity and magnetic field.
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Re:Dark Matter Is an Illusion, New Antigravity Theory Says by mparr4 on Sunday September 04, 2011 @08:13PM (#2960648)
According to this theory, it would be the magnetic field alone--not the gravitational field--that is overwhelming the antigravity effect. After all, if these particles had an opposite "gravitational charge", then their experience of gravity wouldn't be attractive but would be equal in magnitude but opposite in orientation. Hence "anti"gravity.
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Re:Dark Matter Is an Illusion, New Antigravity Theory Says by hollerith on Sunday September 04, 2011 @11:38PM (#2961047)
I accept the correction. Good one.
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