What is the difference in their results between contact and non-contact interactions of cosmic bodies?

Non-contact interactions (gravitational and electromagnetic) determine the orbits of cosmic bodies, and can also affect the shape of cosmic bodies (tides). Contact interactions of cosmic bodies, which are inelastic (collisions), are necessarily accompanied by the release of heat, which entails a change in the appearance of cosmic bodies (in particular, craters and seas on the Moon), and part of the mechanical energy of interacting bodies goes to change their orbits.

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