We can not speak of gravity before they understand what really matter, so the main question is:
What is the matter? : http://fortunadrago.xoom.it/main/?p=2078&lang=en (http://fortunadrago.xoom.it/main/?p=2078&lang=en)
and now with a better idea:
What is the gravity? : http://fortunadrago.xoom.it/main/?p=2102&lang=en (http://fortunadrago.xoom.it/main/?p=2102&lang=en)
I hope nobody feels offended by what I wrote ...
Please consider a calm mind and with the benefit of the doubt!
greetings
DOM