Good video , yes that explains it . Space is the trampoline . Again , I ' m not an expert , but basically what we think of as empty space is not actually empty . It is like a fabric than can be distorted in any direction , even though it isn ' t visibly perceptible to us . An object like the Earth can displace space just like a rock would in a glass of water . When this happens , it bends space in all directions , similar to the trampoline with a heavy object . The best way to understand is to combine the trampoline metaphor with a water displacement metaphor . It ' s an awkward way to think at first I didn ' t understand for a while , but try to picture these two effects working together and the light bulb will turn on for you .