Please excuse if my question seems very basic (I'm a lay person fascinated by physics and trying to learn more.) I'm trying to better understand gravity. I have read that "gravity is a natural consequence of the presence of matter causing a curvature of spacetime", and also that "the curvature of spacetime is caused by the accelerating movement of dark energy". If dark energy exists throughout the universe, then why do we not experience gravity in space, for instance? Or is it that we do but the effect is very small?