Quote:
Originally Posted by allan gould
Personally I have a hard time trying to accept dark matter and dark energy. The simplest explanation for dark matter is that there is needed a modification of laws of gravity a la Newton.
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I agree about the dark energy hypothesis. I think it seems to much of an "on the fly" fix to observations interpreted as an accelerating expansion of the Universe. Even so, down the track, it could turn out to be right.
However, the dark matter fix is fairly plausible. I think it leads to a simpler mathematical explanation of the assumed "binding" forces required to hold galaxies together than the modified Newtonian equations required by MOND. Having said that, only further observations will establish which is correct- dark matter or MOND or, perhaps, something else.
Flexibility is the key to success!
Regards, Rob