oh dang i wrote all that and then noticed ur talking about spacetime curvature, not curvature of light as a result of gravity
alltho they are related
all i kno about spacetime curvature is:
that we live in a universe with no curve, and you can tell cause the angles of a isocosles triangle are the same and because using the definition of a circle results in a shape with the same rate of change throughout (or some better def)
if u lived in a universe with negitive curvature , any line pointed in any direction would eventually hit with itself. so if u travled off in a spaceship would get back to earth (or to where earth was when you started anyway). the best way to think about why this is tru is to think of a surface with closed curvature as being a sphere, and if you got far enough on a sphere you get back to where you started. same idea, but 4-d or something
if negitive is a sphere, then positive would be best described as a horse-saddle shape, where 2 cornors of an xy graph go up to pos infinity and 2 go to neg infinity. positive curvature is wierd, and i dont totally get it, but its kinda like some parts of space would be way the fuk off one way and some would be normal... or something
and dark matter is just a sciencey way of saying "we have no fucking idea where this extra gravity comes from"
i heard string-theory had some cool ideas about that but it seems to have cool ideas about everything so whatever
does that answer ur querry? |
