Message #20567

[b]

Falling, up and down are relative to an object with mass. In our case the earth. An illustration they like to use is a trampoline. A heavier person than you will create a depression in the trampoline fabric which will pull you toward that person to some degree. Similarly, objects in space-time that have more mass pull in all the objects around it because it 'curves' space-time around itself. Except space-time is not a one-dimensional flat piece of fabric. Does that make sense?