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Space - Coggle Diagram
Space
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Gravity works when a large mass that is usually a sphere attracts other things to its surface. This happens everywhere and once a smaller object get in a specific radius, that object is caught in orbit. If an object bigger than another one, they collide because the gravitational pull of the bigger object is too big. This principle works all over the known universe because all the galaxies we know are held together by a black hole. Black holes have an exceptional gravitational pull, which is how the whole galaxy stays together. So if you are on space, you can drift anywhere but if you get too close to a big object, you would be pulled towards the surface of that object.