Re: SPACE: New propulsion technologies

Anders Sandberg (asa@nada.kth.se)
16 Aug 1999 14:28:15 +0200

Ron Kean <ronkean@juno.com> writes:

> When you say that 'Every particle has an anti-particle...', do you mean
> that there are equal amounts of matter and anti-matter?

No, locally (i.e. the known universe) there is much more matter than antimatter - why is one of the big questions in cosmology.

Every kind of particle has a corresponding antiparticle - electrons have positrons, protons antiprotons, quarks have antiquarks etc. The exceptions are those particles that have themselves as antiparticles, such as photons. 

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Anders Sandberg                                      Towards Ascension!
asa@nada.kth.se                            http://www.nada.kth.se/~asa/
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