The Time Travel

All of us are time traveleres right now! While you keep clicking your mouse time is travelling around you and the present keeps changing into the past. Albert Einstein lays down the possibilities of a time travel with his SPECIAL THEORY OF RELATIVITY. We know that there are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day and 365 days in a year. These are the basic numbers of time that we all learned in school.

Time is being called the fourth dimension of our universe. The other three dimensions are of space--up-down, left-right and backward-forward. Time cannot exist without space, and space cannot exist without time. This interconnected relationship of time and space is called the spacetime continuum, which means that any event that occurs in the universe has to involve both space and time. According to Einstein's theory, time slows as a body approaches the speed of light.

This implies that traveling faster than the speed of light could open up the possibility of time travel to the past as well as to the future. The problem is that the speed of light is believed to be the highest speed at which something can travel, so it is unlikely that we will be able to travel into the past.

Machines have not been invented so far on time travel but most theories do not depend on machines but on natural phenomenon. These space phenomena, which we are not even sure exist, include: Rotating black holes, Wormholes, Cosmic strings. When stars that are more than four times the mass of the sun reach the end of their life and have burned up all of their fuel, they collapse under the pressure of their own weight. This implosion creates "black holes," which have gravitational fields so strong that even light cannot escape. Anything that comes in contact with a black hole's event horizon will be sucked in. The event horizon is the boundary of a black hole at which nothing can escape. It has a shape similar to an ice cone. Another type of black hole, called a Kerr hole, is also theoretically possible. Kerr holes are rotating black holes that could be used as portals for time travel or travel to parallel universes. If Kerr holes do exist, it might be possible to pass through them and exit out of a "white" hole. A white hole would have the reverse action of a black hole. So, instead of pulling everything into its gravitational force, it would use some sort of exotic matter with negative energy to push everything out and away from it. These white holes would be our way to enter other times or other worlds.

There could be another type of tunnel-like structure existing in the universe that could be used for a time travel portal. Wormholes, also called Einstein-Rosen Bridges, are considered to have the most potential for time travel if they do exist. Wormholes are considered possible based on Einstein's theory of relativity, which states that any mass curves spacetime.

Scientists have discovered that even at the speeds of the space shuttle, astronauts can travel a few nanoseconds into the future.

By: sakthi
Published: 01/11/08