Dark matter (Introduction)

by George Jelliss , Crewe, Thursday, July 09, 2009, 22:49 (5412 days ago) @ David Turell

I've come across this theory before, but it's nice to know there are now tests being worked out to decide the issue. That makes good science. However, I find the theory unsatisfactory, since the point at which the law of gravity changes seems quite arbitrary. There ought to be some reason for the change. But on the other hand the dark matter theory is also unsatisfactory, though for different reasons, namely that it requires undiscovered particles with odd properties. All we can say is: continue to "watch this space"!

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GPJ