To where here's there
阴影和这个伟大世界

Paradoxes inherent in time travel have always provided
inspiration for me. Assuming that a civilization has the
technical capability to orbit black holes and move wormhole
mouths, there is still the question of the time traveler\'s
journey into the past and his possible influence on his
own present existence.

Black holes occur when stars of a certain size use up all
of their nuclear fuel. A star in such a situation begins
to shrink and become very dense; the more dense it becomes,
the greater its gravitational field, to the point that
nothing, not even light, can escape. An additional effect
is a distortion of spacetime with a resultant slowing of
time itself. Theorists speculate that at its heart a black
hole must contain a \"singularity,\" a single point of
infinite density where the laws of quantum mechanics no
longer apply, an \"edge\" of the universe and of time
itself.

A person or object entering the singularity would be
subjected to stretching and squeezing (literally squeezed
out of existence), and would not survive to report the
experience. However, there are those who speculate that a
free-fall trajectory which takes a spacecraft close to the
black hole, but not close enough to be swallowed by the
singularity, would effectively be a one-way time machine.
\"By choosing the right path around the black hole, such a
journey, which might take a few hours according to the
clocks on the falling spacecraft, could be made to take as
long as you like according to the outside Universe.\"
And your journey begins now.....with me.. for you are the Star !
and im the Black Hole just right behind
you... And time is on my Side.........
~Shadow