So gravity is supposedly caused by objects such as planets, stars, etc. resting on space which curves space. The more massive the object, the larger the bulge it creates, the stronger the gravity. My question is, why do these objects even rest on space in the first place? It's as if there's a downward pulling force in space itself. There must be something other than gravity pulling objects down because otherwise, orbits won't exist. I apologize in advance if I just made a really idiotic thread. I'm not a pro at physics, but I'm hoping to learn.