Is there any evidence for closed timelike curves?

Question

Is there any evidence for closed timelike curves?

Answer 1

René Descartes, the French mathematician and philosopher, wrote that the shortest distance between two point is a straight line. Perhaps but what is a straight line at the scale of the universe? And if the universe is curved, in relation to what is it curved?

On a sphere, the shortest distance between two points is a curve (called the Great Circle on earth). Watching the sky, we see in both space and time. The farther we look, the longest in the past we look. Nothing is what it seems to be. Even the sun is seen where it was 8 minutes ago.

What is then the 'curvation' of space? Could the universe be a closed loop in both space and time? Perhaps. Relativity puts us at our frame of observation without an absolute reference. We could then imagine that anywhere and any time we are, we observe the universe as 'here and now' that could be seen as the node of a doughnut with no hole but a point. But what about the Big Bang then? ... hum, back to square one! :-)

Answer 2

is there any evidence for open timelike curves. (that is supposed to be a joke, which i have discovered, apparently i am better at in person)

Answer 3

they state it in some phisics and a few astronomy books. but from what i read i see no evidence for even the closest galaxy, star, or nebula to be of exsistance. though if it is 1o million light years away it might not exsist anyway. but no i have heard no evidence of that such subject to be true.

Answer 4

closed timelike curves?it maybe state in any modern physics book..try to read..

hope i'm helped you.