- #1
Kenneth w
- 3
- 0
How fast must we go to travel to another galaxy?
Octonion said:ORRRR you can do some research on the potentiality of a new form of travel where one simply contract the space-time between you and the galaxy over and over again until you are extremely close to it. Miguel Alcubierre wrote a paper on this in 1994 and recently there was proof that such contractions could occur on small scales at MIT..i believe..it could have been somewhere else. But luckily, space-time can be contracted at speeds far exceeding that of the speed of light its just a matter of waiting thousands of years until such technology exists. MY prediction is that we will not travel to other galaxies while the speed of light is the maximum limit for our travel speed.
Octonion said:ORRRR you can do some research on the potentiality of a new form of travel where one simply contract the space-time between you and the galaxy over and over again until you are extremely close to it. Miguel Alcubierre wrote a paper on this in 1994 and recently there was proof that such contractions could occur on small scales at MIT..i believe..it could have been somewhere else. But luckily, space-time can be contracted at speeds far exceeding that of the speed of light its just a matter of waiting thousands of years until such technology exists. MY prediction is that we will not travel to other galaxies while the speed of light is the maximum limit for our travel speed.
Octonion said:Here's an updated paper submitted in 2000 http://arxiv.org/pdf/gr-qc/0009013v1"
ryan_m_b said:To accelerate to the speed of light would require either infinite energy or infinite time so yes, it is the limit. There are speculative proposals to get around this; wormholes and warp drives.
It may be possible to create http://en.wikipedia.org/wiki/Wormhole#Traversable_wormholes" held true).
On the subject of warp drives this paper which is further discussed in this paper proposes ways of getting around the horrendous energy requirements outlined in this paper. The "trick" is to change the warp bubble so that it's exterior radius is microscopic yet the interior radius is large enough to accommodate your vehicle (essentially making a warp bubble that's bigger on the inside than on the out). Apparently this would greatly shrink the amount of energy needed to manageable levels. They don't outline how exactly a shell could be build around a ship in such a fashion nor how the ship could leave.
However neither of these approaches fixes the other problems of a warp bubble such as requiring the construction of an exotic matter shell, superluminal signalling to steer/control the bubble and the huge amount of radiation a warp drive subjects you to. There are some interesting (but technical) objections in this paper that apparently show that a warp drive would only be capable of very low velocities as well as highlighting other problems.
So without exotic matter that may not even exist we are stuck to trying to make slower than light vehicles. To make an interstellar vehicle would be fantastically complex though requiring horrific amounts of energy (even if we used an antimatter rocket we would need potentially thousands-millions of tonnes for a high fraction of c.) as well as a thorough understanding of ecology so as to make a stable environment in a closed system to keep the occupants alive.
jnorman said:anywhere near the speed of light will work pretty well. if you can get your spaceship to 0.99999C, you can travel to another galaxy within a reasonable amount of time, according to your ship's clocks (at that kind of speed, your ship will travel around 10LY per year of your clock time). however, the amount of time which passes on Earth during your trip will be ENORMOUS.
Kenneth w said:Hmm, Andromeda is 2,000,000+ lys away. At c, it would take 2mil years to get there. To do it in ten years would take a speed of millions of times c. Let's talk energy consumption, photons travel at c, why don't they consume infinite energy? Photons do have mass..very little, but they do have some and it takes energy to energize them to c. Where does that energy come from? I don't know, but I don't think they consume infinite energy. Who has proven that time dilation is directly porportional to speed? There may be a limit, if so, all current math concerning it may be flawed. I don't believe that the physics and the math concerning FTL travel has been discovered yet.
Kenneth w said:Lets talk energy consumption, photons travel at c, why don't they consume infinite energy? Photons do have mass..very little, but they do have some and it takes energy to energize them to c.
Kenneth w said:Who has proven that time dilation is directly porportional to speed?
Kenneth w said:Hmm, Andromeda is 2,000,000+ lys away. At c, it would take 2mil years to get there
Kenneth w said:There may be a limit, if so, all current math concerning it may be flawed. I don't believe that the physics and the math concerning FTL travel has been discovered yet.
moejoe15 said:If we really were an intelligent species, and the only one around, we could spread DNA throughout this galaxy. The speed of light is really only a time limit for expansion of life if we wanted to seed this galaxy. We don't have to send people. We could send just bacteria and let evolution take it's course. Maybe someday in the far future we will see smoke signals from our efforts if we survive, if we don't we would at least know we have sown the seeds.
tvscientist said:Assume an advanced civilization has been sending entangled particles out into the universe for, say, one million years. Let's then assume we develop a way to detect these particles. Further assume the Bell Theorem of non-locality provides instantaneous transmutations of these particles. At the very least we could send a sort of quantum/state morris code back and forth.
Intergalactic space travel is the concept of traveling between different galaxies in outer space. It involves crossing vast distances and encountering different celestial bodies and environments.
Currently, intergalactic space travel is not possible with our current technology. The distances between galaxies are so vast that it would take thousands of years to reach another galaxy. However, scientists are constantly researching and developing new technologies that may one day make intergalactic space travel possible.
Scientists study intergalactic space travel through theoretical physics, computer simulations, and observations of outer space using telescopes and other advanced technologies. They also conduct experiments in microgravity environments to better understand the effects of long-distance space travel on the human body.
Some potential challenges of intergalactic space travel include the vast distances between galaxies, exposure to radiation and other hazards in outer space, and the psychological and physical effects on astronauts during long-term space travel. Additionally, developing the necessary technology and resources for intergalactic space travel would also be a major challenge.
Intergalactic space travel has the potential to greatly expand our knowledge of the universe and potentially lead to new discoveries and advancements in science and technology. It could also open up new opportunities for space exploration and colonization, as well as the potential for finding extraterrestrial life. Additionally, intergalactic space travel could also have economic benefits, such as the potential for asteroid mining or establishing trade routes between different galaxies.