I keep thinking about Flatland and the cube rotating and interacting with the two dimensional world. If there is a 'rotating' five dimensional object intersecting our four dimensional world, what would that look like?
If all we can 'see' is the effect in our four dimensional world then the...
Can someone explain why 'dark matter' is the dominate explanation for the 'excess' gravity seen around galaxies?
It seems to me that we have made an assumption that mass causes gravity. Isn't it possible that gravity arises from some as yet not understood mechanism?
I may be way off base...