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Hi Kristin,

I think the crux of the article is that matter-matter intereactions will act with positive gravity, antimatter antimatter interactions would act with positive gravity, but that matter-antimatter interactions would have negative gravity (or anti-gravity), while all having positive mass.

Antimatter wouldnt repel light though, since light would react with anti-matter the same as with normal matter, since it has no rest mass.

Also, if you found entire galaxies made completely of antimatter, how would you know? I remember reading something related to this in a popular science book, of how, if you were in communication with an alien race, how you could work out if they were made of antimatter, before you met them. Unfortunately, i cant remember the discussion, nor which book it is, but I shall try and chase it down.

Jonny




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Faster than the speed of light 140 Dr Manjir Samanta-Laughton 06-Apr-11 15:45
Re: Faster than the speed of light 198 Laird Scranton 15-Apr-11 03:10
Re: Faster than the speed of light 138 Karen H Taylor 15-Apr-11 11:18
Re: Faster than the speed of light 95 Laird Scranton 16-Apr-11 05:11
Re: Faster than the speed of light 129 Me 20-Apr-11 00:19
Re: Faster than the speed of light 144 brucenyc1 18-Apr-11 20:50
Re: Faster than the speed of light 113 Dr Manjir Samanta-Laughton 19-Apr-11 22:38
Re: Faster than the speed of light 108 Laird Scranton 20-Apr-11 05:14
Re: Faster than the speed of light 137 Me 20-Apr-11 00:23
Re: Faster than the speed of light 204 Aine 20-Apr-11 01:06
Re: Faster than the speed of light 169 JonnyMcA 20-Apr-11 18:55
Re: Faster than the speed of light 115 Aine 21-Apr-11 13:33
Re: Faster than the speed of light 150 JonnyMcA 21-Apr-11 22:19
Re: Faster than the speed of light 101 Aine 25-Apr-11 13:37
Re: Faster than the speed of light 141 JonnyMcA 25-Apr-11 21:01
Re: Faster than the speed of light 214 Aine 27-Apr-11 16:03
Re: Faster than the speed of light 126 Me 05-May-11 00:48
Re: Faster than the speed of light 128 Laird Scranton 20-Apr-11 05:19
Re: Faster than the speed of light 163 Me 20-Apr-11 19:19
Re: Faster than the speed of light 152 Laird Scranton 21-Apr-11 15:58
Re: Faster than the speed of light 187 Absinthujone 27-Apr-11 15:21
Re: Faster than the speed of light 157 JonnyMcA 20-Apr-11 18:52
Re: Faster than the speed of light 138 Me 20-Apr-11 19:15
Re: Faster than the speed of light 146 NetWorkAngel 21-Apr-11 17:09
Re: Faster than the speed of light 194 Absinthujone 27-Apr-11 15:12
Re: Faster than the speed of light 96 Dr Manjir Samanta-Laughton 30-Apr-11 09:10
Re: Faster than the speed of light 138 Me 05-May-11 00:41
Re: Faster than the speed of light 139 JonnyMcA 05-May-11 10:04
Re: Faster than the speed of light 123 Me 06-May-11 19:40


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