Quote:
Originally Posted by north
yes and no
gravity , GR does not give an accurate description of gravity because like the example I gave , in the case of mercury , it seems that the gravity of the sun is far weaker then expected for its mass . the gravity of the sun should swallow mercury but it doesn't , why ? in physical dynamic terms
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No, it shouldn't. Mercury is orbiting the sun. It does not fall into the sun because it is in orbit. Because the sun's gravity is quite high, the required speed to maintain an orbit is quite high as well, but that does not mean that the sun should swallow it. Do you know how an orbit works?