You have to be really careful when talking about time travel. We all travel through time at the rate of 60 seconds every minute.
Someone going past you at close to the speed of light, or going close to the event horizon of a black hole will age slower because of time distortion effects, but they won't disappear into the future or anything like that. Time for them just moves slower.
Real time travel is when you can actually move backward in time, not just forward. There has been some suggestion that this is possible if a doughnut shaped black hole could be made and someone could go through the central hole. Whether that is possible or not, nobody knows.
Not a black hole, but in theory a space-time wormhole, which is similar to a black hole, will allow time travel. Physicist Kip Thorne devoted a few chapeters to this in this book "Black holes and time warps".
A wormhole can theoretically be constructed using a combination of matter and "exotic matter" which has negative gravity. It would be similar to a black hole, only it would have two openings. If you step through one opening, you exit the other. Initially, the two opeings of a wormhole would be close together. Then if you accelerate one opening at nearly the speed of light, it would experience time dilation, and go at a faster than normal rate through time. From the other opening, you could observe this effect as though it was happinging real-time. So if the other end used time dilation at near-light speed to go 100 years into the future, you could then step through and instantly go 100 years into the future. And stepping back through again would carry you 100 years back into the past. If the opening went near light-speed in a circle, it would also end up in the same general location as the other, but in a different time. Therefore it would be possible to travel into the past, but only if a wormhole had already been created in the past, and one end sent into the future.
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You have to be really careful when talking about time travel. We all travel through time at the rate of 60 seconds every minute.
Someone going past you at close to the speed of light, or going close to the event horizon of a black hole will age slower because of time distortion effects, but they won't disappear into the future or anything like that. Time for them just moves slower.
Real time travel is when you can actually move backward in time, not just forward. There has been some suggestion that this is possible if a doughnut shaped black hole could be made and someone could go through the central hole. Whether that is possible or not, nobody knows.
Not a black hole, but in theory a space-time wormhole, which is similar to a black hole, will allow time travel. Physicist Kip Thorne devoted a few chapeters to this in this book "Black holes and time warps".
A wormhole can theoretically be constructed using a combination of matter and "exotic matter" which has negative gravity. It would be similar to a black hole, only it would have two openings. If you step through one opening, you exit the other. Initially, the two opeings of a wormhole would be close together. Then if you accelerate one opening at nearly the speed of light, it would experience time dilation, and go at a faster than normal rate through time. From the other opening, you could observe this effect as though it was happinging real-time. So if the other end used time dilation at near-light speed to go 100 years into the future, you could then step through and instantly go 100 years into the future. And stepping back through again would carry you 100 years back into the past. If the opening went near light-speed in a circle, it would also end up in the same general location as the other, but in a different time. Therefore it would be possible to travel into the past, but only if a wormhole had already been created in the past, and one end sent into the future.
No, because even if you somehow got within the million mile radius of a black hole, you'd be ripped to shreds in a matter of seconds.
With their immense gravitational force, you are able to relatively travel greatly into other object's futures, but not able to return to the past.
nooooo.....they only crush u ......!!!!!!