sci.physics.relativity

/news/book-reviews/the-new-time-travelers/2007/10/08/
"The New Time Travelers. Time travel has preoccupied writers from .
Wells to Martin Amis and provided Hollywood with a steady stream of
box-office hits, from the Back to the Future series to Denzel
Washington's most recent thriller, Deja Vu. But will it ever be
possible to duck back and forth between the ages? In The New Time
Travelers, David Toomey argues a qualified yes......Broadly, Toomey
says, exploiting relativity could help with travel into the future.
All we need, he contends, is the technology necessary to journey
through space at something approaching the speed of light or to
position ourselves in orbit around a black hole. Under such conditions
our own time slows (it's an effect called time dilation); we wait for
the calculated period and then return to Earth to find that the
required number of years have passed. Simple......The technology of
travelling into the past is problematic......Simply stated, it means
that if we travel back to 1929 with the aim of killing Hitler before
he becomes a major problem, something - a misfiring gun, a missed
train or something equally irksome - will thwart us. But Toomey
explains that a handily placed wormhole subjected to time dilation
might help to navigate the past, regardless of any influence we might
exert when we arrive."

Pentcho Valev