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quote:Originally posted by anarres
OK, so 3 or 4 seem very likely to have simple explanations, but that still leaves 8 or 9 that are simply scary (or exciting, it depends I guess).
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Dunno too much about 3. But as far as 4 is concerned, there aren't too many simple explanations left. Some of those cosmic rays are so high energy that it boggles the mind. For example, the most powerful ray yet discovered was so powerful that the single proton in it packed enough energy could lift a standard size brick for about 5 feet. Considering how small the rest mass of a proton is that is an awesome amount of energy. That proton must have been moving at practically the speed of light.
Now the point is that there are very few mechanisms in the known Universe (much less in the known galaxy) that can be such an awesome particle accelerator.