07-01-2011, 04:55 PM
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Black Holes
A black hole is a region of space from which nothing, not even light, can escape. John Michell, using Newton’s ideas of gravity as a force, saw that if a strong enough gravity were at the surface, that not only could material objects not leave the surface, but light itself may bend and be trapped Karl Schwarzchild (1873-1916) In 1916 used Einstein’s General Relativity to define a Black Hole Defined the “event horizon” gravitational radius of a black hole AKA the … “Schwarzchild Radius”
Worm Holes
a wormhole is a hypothetical topological feature of spacetime that would be, fundamentally, a "shortcut" through spacetime. For a simple visual explanation of a wormhole, consider spacetime visualized as a two- dimensional (2D) surface (see illustration, right). If this surface is folded along a third dimension, it allows one to picture a wormhole "bridge".
White Holes
A white hole is a hypothetical region of spacetime which cannot be entered from the outside, but from which matter and light may escape. In this sense it is the reverse of a black hole
Paradoxes of Time Travelling
A person could only go back in time as far back as when the first time machine was activated. He dedicated his life to time travel so that he could see his father again, but this is Impossible.
