sush
15th January 2006, 05:46 PM
i was doin' some research on space and time.....do u people think it is possible to make time machines usin' the followin' principles:
Two theoretical types of time machine are known. Both depend on the fact that space and time are not distinct entities, but merge into one four-dimensional whole, the space-time of relativity.
1.The first kind of time machine consists of an extremely dense object that rotates extremely rapidly. The strong gravitational grip of the massive object “drags space-time around” as it spins.A spaceship travelling on a precisely worked out path could approach a suitable massive spinning object and travel past it on a trajectory that seemed to all the occupants of the spaceship to be merely a journey through space, and affected every instrument on board accordingly, yet emerged on the other side in a different time, either in the past or in the future.The kind of spinning object required to achieve this result would be equivalent to ten neutron stars containing as much mass as the Sun in a volume no bigger than Mount Everest, joined pole to pole to form a cylinder and spinning 2,000 times every second. No such object is known, and it is not clear that if one were formed it would be stable: apart from anything else, it seems that gravitation would soon crush such an object to a sphere, and then a black hole, a theoretical object from which no matter or radiation escapes. But millisecond pulsars, which are individual neutron stars rotating about 700 times per second, are intriguingly close to the conditions required for time travel.
i don't think i will be able to put this thing into practical use asi sometimes feel that this is quiet difficult.
2.The second approach to time travel involves black holes. The equations of relativity suggest that pairs of black holes may be connected by “tunnels” that make a short-cut through space-time. These tunnels are known as wormholes. The two black holes-the mouths of the tunnel-can be anywhere in space or time, and still be connected by a wormhole. Thus one mouth could be here now, while the other is in the same place a thousand years in the past. If so, an object could enter the present-day mouth and emerge a thousand years ago.
Two theoretical types of time machine are known. Both depend on the fact that space and time are not distinct entities, but merge into one four-dimensional whole, the space-time of relativity.
1.The first kind of time machine consists of an extremely dense object that rotates extremely rapidly. The strong gravitational grip of the massive object “drags space-time around” as it spins.A spaceship travelling on a precisely worked out path could approach a suitable massive spinning object and travel past it on a trajectory that seemed to all the occupants of the spaceship to be merely a journey through space, and affected every instrument on board accordingly, yet emerged on the other side in a different time, either in the past or in the future.The kind of spinning object required to achieve this result would be equivalent to ten neutron stars containing as much mass as the Sun in a volume no bigger than Mount Everest, joined pole to pole to form a cylinder and spinning 2,000 times every second. No such object is known, and it is not clear that if one were formed it would be stable: apart from anything else, it seems that gravitation would soon crush such an object to a sphere, and then a black hole, a theoretical object from which no matter or radiation escapes. But millisecond pulsars, which are individual neutron stars rotating about 700 times per second, are intriguingly close to the conditions required for time travel.
i don't think i will be able to put this thing into practical use asi sometimes feel that this is quiet difficult.
2.The second approach to time travel involves black holes. The equations of relativity suggest that pairs of black holes may be connected by “tunnels” that make a short-cut through space-time. These tunnels are known as wormholes. The two black holes-the mouths of the tunnel-can be anywhere in space or time, and still be connected by a wormhole. Thus one mouth could be here now, while the other is in the same place a thousand years in the past. If so, an object could enter the present-day mouth and emerge a thousand years ago.