How will planets move if there is no gravity in the universe?

Could you please elaborate on how the movement of planets would be affected if there were no gravity in the universe? Would they still orbit around stars or would they move in a completely different pattern? Would celestial bodies cease to exist as we know them, or would they find some other means of interacting with each other? Understanding the implications of such a scenario could help us gain a deeper insight into the fundamental forces that govern our universe.