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Reader Comments (Page 1 of 1)
3-20-2009 @ 12:04PM
bmiller said...
Space is expanding differently than scientist's models predict from what we can observe (stars, galaxies, etc). One of the ways to get the model to work is to assume there's something we can't observe directly, but has an effect on the Universe's expansion (i.e. Dark Matter).
The Aether was the substance that scientists thought was between the planets and stars. They thought that light needed a medium to travel in, like sound waves do. Because they can't measure it's effect, they determined there was no (A)ether.