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Moving Earth Set Stop Moves Objects Refutation Objections

Front refutation to objections to Copernicus/Kepler theories: 
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a) How can earth keep moving with nothing to push it?   Earth has inertia; once set in motion, continues moving since no forces to stop it; set in motion initially by Big Bang → moving gas and dust →formation of moving planet; moves in elliptical orbit rather than straight line due to gravitational force of (primarily) the sun
b) Objects not attached to earth should be left behind as earth moves through space.Those objects also have inertia and will continue to move along with earth; no reason to stop moving

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