On Mar 16, 2006, at 6:18 PM, Bob Fickle wrote:
A 100 GeV charged particle (electron OR proton) has a radius of curvature in the galactic field (1 microgauss avgerage) of about 3 billion km (3 light-hours). No way they're crossing galactic distances anytime soon- probably billions, rather than millions, of years..
They only have to go 150,000 ly. Don't forget, the photons left 150,000 years ago. The electrons are right behind. In other words,
(1-0.99999999)*150000y = 0.0015 year = 0.5481 days Fred's making sense to me. What's a few extra hours for curvature? Horace Heffner
