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>> What holds the sand to the surface as it blasts through outer space at 500 KM a second?” <<
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Gravity.
What other force is involved?
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If you read the article you will see that there is hardly any gravity at all.
So gravity is not the answer which I was aware of before I asked the question.
Funny thing is everyone who told me gravity is the answer is wrong but they looked like bigshots doing it.
How many will admit it?