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Friday, November 02, 2007

Space Travel De-mystified

Well, here we are living in a world where we can barely get human beings to the moon and with NASA constantly canceling projects like network TV drops shows, the chances of sending people to Mars get worse and worse. But science fiction writers aren't simply going to give up writing about faster-than-light spaceships because our current society seems to be in a bit of a rut--nothing truly monumental has happened in the last twenty years, at least nothing like the first moon landing.
Space travel, however, is rather complicated, depending on the sort of story you intend to write. If you write hard SF you may find yourself in a bind. Einstein--that unrelentingly intelligent bastard--basically makes faster-than-light travel impossible (theory of relativity and all). Yet there are so many different types of fictional, and real, methods of traveling in space. What methods are realistic and what methods are fantasy?

  • Faster-than-light Standard & Lightspeed (i.e. at the speed of light)
    Your typical, commonly used, rarely explained method. Basically, it literally goes faster than light by its own power and within real space--not a wormhole, hyperspace, etc.. This is the type of drive you can't really explain because it's so unbelievable anyway it would be a waste of your time, and the time of your readers. You'd find yourself in a conundrum if you did. Einstein made this obsolete as a realistic approach--though it sort of was fantasy to begin with--by postulating that the closer you get to the speed of light, the more fuel you need to close the gap. The problem is that you eventually hit a point where no matter how much fuel you add, the fuel's weight counteracts the push it would provide. You'd hit a point where you couldn't ever put enough fuel in the ship to go any faster. It was a lot more complicated than that, because it's Einstein, but you get the idea.
    Generally speaking, your standard form of FTL drive has a fuel source that is tangible and accessible and in some way or another works like rocket fuel--meaning it burns away or dissipates and doesn't have any affect on the fabric of space.
  • Hyperdrive
    I'm referring to your typical instant-to-light-speed drives. Strangely, these are also drives that are never really explained, mostly because you don't have to. Your audience simply has to assume that you can go from zero to light speed in less than sixty seconds and there isn't anything out of the ordinary about that. Maybe you'd come up with a really inventive way to make this work, but most likely you'll just resort to calling it an FTL drive or give it a fancy name and leave it at that. If the rest of your story is good it won't really matter anyway.
  • Jump Drive
    This may have a different name. You could call it a teleport drive. The idea is that your ship simply disappears and reappears somewhere else. These are also called "discontinuous" because the traveler never traverses the actual real-space distance. You simply poof into existence somewhere else--like a genie. These could be in many different forms--jump to anywhere, jump to a 'node' in a specific location, jump only certain distances, jump in known space, etc. Either way, it's all fantasy because, as far as we know, you can't just disappear and appear somewhere else.
The Middle Ground (meaning ones that are plausible, but without any real, consistent evidence to support it)
  • Fold Drive
    This is somewhat like a jump drive, as from the perspective of someone watching it would look like the ship simply disappears and reappears somewhere else. Fold drives revolve around the idea of being able to actually fold space so that two points are put side by side. Think of it this way: take a piece of paper and poke a hole on each end (longways), then fold that paper until those holes meet up and put your finger through it. That's folding space. The concept is, well, probable, but not possible in our near future. The energy required would be considerable. However, since space is filled with events where things get screwed up from black holes and the like, it wouldn't be all that surprising to realize that folding space isn't all that least to the universe.
  • "Trail" Drive
    Think of this as being like a railroad. A train has to have tracks to get from one point to another. The idea behind a "trail" drive, or railroad drive, is that the ship could achieve FTL in one of two ways: along a fix structure that allows the ship to do so, or along a trail of materials that the ship could use to achieve FTL.
    In the first case you have two problems. The first is figuring out how to use such a structure to allow a ship to break the light barrier, which, according to Einstein, is impossible. Perhaps if the structure manipulates real-space it my be possible. The second is that you would have to build this structure in the first place, which would take thousands upon thousands of years most likely. You need a lot of material and you need people to watch over the structure when it breaks.
    The second case is probably even more ridiculous. If you were to put a trail of matter that could be used to propel a ship to the speed of light you would have presented several problems while solving another. While you have figured out how to get a ship up to speed without the ship having to carry its fuel source with it, you also have created a big problem: you can't do these travels all the time. You'd have to put the material there, which would take thousands of years, and you'd have to keep putting it there every time it is used. This would be a logistics nightmare. It would still be possible, but it is very unlikely that someone would waste the time to do this.
  • Ion Drive
    These are actually real today. We use them in satellites because they don't require much in the way of fuel. Currently our ion drives accelerate very slowly, however they can accelerate for a significantly longer period of time than combustible fuel sources, meaning that in the long run an ion drive can go faster. Here's a basic understanding of how it all works from this site.
    Ion propulsion is a technology that involves ionizing a gas to propel a craft. Instead of a spacecraft being propelled with standard chemicals, the gas xenon (which is like neon or helium, but heavier) is given an electrical charge, or ionized. It is then electrically accelerated to a speed of about 30 km/second. When xenon ions are emitted at such high speed as exhaust from a spacecraft, they push the spacecraft in the opposite direction.
  • Fuel Drives
    I'm using a basic concept here. Basically any sort of drive that uses a combustible fuel--jet fuel, etc.--or any sort of fuel that we know of today that can be used to propel spacecraft. These sorts of drives would be impossible to use for long distance travel--i.e. out of our solar system--are quick, but can only be used in short bursts, and are heavy and dangerous. I don't think much more explanation is needed. We all should know how fuel works since most of us drive cars.
  • Nuclear Drives
    There are two types of nuclear drives--reactor and impact.
    Reactor drives should be pretty easy to understand. Take a tin can, put a nuclear reactor in it, and you now have a tin can with a radiation packed rear end. You'd of course need radiation shielding for the crew and some sort of guarantee that the darn thing won't explode on you in the middle of space, since you can't exactly run away. In theory, though, it would be a long lasting propulsion device that could get you going relatively fast. Again, though, you couldn't do much in the way of long distance travel because it could take you decades to get to another star.
    Impact drives are, well, interesting and crazy at the same time. The idea is that you have the ship in front and some sort of metal plate or a thick rear area. Then, you cause small nuclear explosions in the rear and the impacts shove the ship in whatever direction you're wanting to go. You need a very sturdy rear to the ship, though, and a POWERFUL radiation shield. Again, no long distance travel here, but certainly quick travel. And there is a lack of steering control.
  • Wormholes
    Hold on, I know, you're thinking "this is just science fiction nonsense". Well, yes, it is, but Einstein also acknowledged that his theory of relativity left open the possibility for wormholes and scientists have been postulating that they actually exist. If they do exist, then one could possibly use them for travel.
    Wormholes can be described simply as bridges through non-real-space--meaning not in 'our' perception of space, but through the fabric of space--connecting x and y. There's no real way to know what a wormhole would look like, since none of us have been in one. Maybe they would be like bright tubes as we've seen on TV, or perhaps you wouldn't even notice you were in one. In any case, you go from here to there.
    There are different types of wormhole uses. One is a drive within the ship itself that opens the wormhole. Another is the use of gateways/portals that open the wormholes either permanently or temporarily upon request. Generally speaking, wormholes require negative energy to work, at least according to the hole that Einstein left. And travel would likely be relatively fast depending on the distance you are traveling.
  • Solar Power
    While this could not really be much use for long distance travel, it's practically free. Once we perfect the technology we can easily build probes and ships that are powered by the sun, making the cost of travel in our solar system cheaper and more accessible. The idea is using solar panels or solar sails to capture the sun's rays and convert it into energy that can be used to propel a ship. It would likely be exceedingly slow going, but it's free.
Each of these has a lot of variations. If you want to have a better idea of all the different methods that have been postulated by scientists and science fiction writers, go here. It's a great little website.

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  1. Andrew9:42 PM

    Really interesting post. I've sometimes pondered the different types of space travel (mainly lightspeed, faster-than-light-speed (Star Wars), and wormholes (Stargate SG-1), but I didn't really stop to think about them in this much detail. Thanks for this.

    You know too much about too many things :P which is good for a sci-fi writer, naturally.

  2. Well thank you Mr. Sir :). I try at least :P

  3. Anonymous6:26 AM

  4. Anonymous6:28 AM

    Read the above links. What would happen if that breakthrough would be realized in Iran??!!

  5. Well, I think the likelihood of anything even close to that coming out of Iran is slim to none. The funding required would be astronomical.
    And there's also the fact that it's really rather fantastical thinking. I doubt this kid has any idea what he's talking about. One too many Star Trek bootlegs in his household.

  6. Anonymous12:52 AM

    Read this debate very carefully: (7 pages for now)

    Also, digg the involved links. I bet you'd change your mind!

  7. Nope, you haven't provided any information published in any accredited location, and therefore, this is nothing but wild, unfounded speculation without scientific support. Until you provide a source from somewhere like Scientific American or some such legit, published form, this is nothing but fantasy. Not to mention, I sincerely doubt that anything like this would be coming out of Iran in any serious form given its political climate.

  8. Anonymous7:46 AM

    There is an entity called University of New Mexico which I hope you’d agree with it. His latest paper was presented in a conference therein:

    Also, there is an entity called the American Institute of Physics (AIP) which I hope you’d agree with it too. The mentioned paper was also published by it:

    Also, his main paper has been cited by some authors dependent to the mainstream physics society in some peer-reviewed journals by now:

    If you still do not believe in his work, just wait to watch a realized wormhole from the CNN breaking news reported from Iran. I understand you, some people only believe their eyes! BTW, what’s wrong with the political climate of Iran, related to this subject?!

  9. Well, the first link doesn't do me much good because all it does is have the guy's name on it. That doesn't tell me anything other than he may or may not have been there...

    Now the second link gives me a summary, which is much more helpful. However, I don't think Mohammad has any freaking clue how impossible it is currently for us to cultivate negative energy. Not to mention how much energy it would take for what he is proposing. We simply don't have the means to do it. Supposedly they moved a photon. I say supposedly because the article doesn't help me because it is simply a summary and I haven't heard of that particular institute, or the last one either.

    The question I think worth asking here is, if this is such a revolutionary and amazing idea, why isn't NASA jumping on it? Or why aren't Scientific American, Astronomy Magazine, and similar venues attempting to cover this? That's what concerns me and that's why I will take this research with a grain of salt. It's mostly wild thinking as far as I'm concerned. A technology like you are proposing that he has come up with would be so important, and if it were possible based on his research not only would NASA be interested--because it could potentially make travel vastly different.

    As for Iran, its oppressive regime and industrial focus on oil and nuclear power/weaponry make it very limited in scientific expansion. Countries like Japan and places in Europe are far better equipped for true scientific research. The Middle East has a huge problem with this. I'm not saying this because I'm American, because I recognize that the U.S. is extremely lax in its advancement of the sciences, as compared to 50 years ago, however, the Middle East is a collection of extremely oppressive governments who do nothing to stall organizations that seek to hurt the innocent. That being said, I have very apprehensive feelings about scientific research being done in places like Iran, where relations with the U.S. and the world are strained because of their government, and where civil liberties are remote, not to mention the distribution of wealth is extremely classist.

  10. Anonymous2:46 AM

    1. You can simply contact there to verify his presentation:

    … just a call would be OK:

    University of New Mexico
    Institute for Space & Nuclear
    Power Studies
    Farris Engineering Center
    Room 239, MSC01-1120
    Albuquerque, NM 87131
    Phone: 505.277.0446
    Fax: 505.277.2814

    2. Do think he has a freaking clue! Below experts might give you a confirmation:

    1 ) F. Rahaman
    Dept. of Mathematics, Jadavpur University, Kolkata-700 032, India

    2 ) M. Kalam
    Dept. of Phys. , Netaji Nagar College for Women, Regent Estate, Kolkata-700092, India.

    3) B. C. Bhui
    Dept. of Maths., Meghnad Saha Institute of Technology, Kolkata-700150, India.

    4) S. Chakraborty
    Dept. of Maths., Meghnad Saha Institute of Technology, Kolkata-700150, India.

    5) M. Sarker
    Dept. of Mathematics, Jadavpur University, Kolkata-700 032, India.

    6) A. Ghosh
    Dept. of Mathematics, Jadavpur University, Kolkata-700 032, India.

    7) B. Raychaudhuri
    Dept. of Phys. , Surya Sen Mahavidyalaya, Siliguri, West Bengal, India.

    8) John Brandenburg
    Florida Space Institute-University of Central Florida
    Kennedy Space Center, Florida, 32899, USA

    9) David Goodwin
    U.S. Department of Energy, Washington, DC, USA

    10) Glen A. Robertson
    NASA Marshall Space Flight Center, Gravi Atomic Reseach, Madison, Al, 35757

    11) Paul. A. Murad
    US Department of Defense, Washington, DC & Vienna, Virginia 22182

    12) Peter A. Kuhfittig
    Department of Mathematics, Milwaukee School of Engineering, Milwaukee, Wisconsin 53202-3109, USA.

    13) Ken D. Olum
    Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, MA 02155

    14) Serguei Krasnikov

    15) Kamal Kanti Nandi
    Department of Mathematics, University of North Bengal, Siliguri, WB 734013 INDIA

    16) Jack Sarfatti
    PhD of Physics from University of California, Riverside.

    17) Eric W. Davis
    Institute for Advanced Studies at Austin, Austin, TX, USA. Research Physicist, 4030 W. Braker Ln., Ste. 300, AIAA Senior Member.

    18) Hal. E. Puthoff
    Inst. for Advanced Studies at Austin, 4030 W. Braker Ln., Ste. 300, Austin, TX 78759, USA.

    3. Why not NASA? Financial problems:

    Also, such innovations might get into the military & black projects first, then (=after years) to NASA.

    4. Why not famous magazines? You can suggest them! Also, revolutionary ideas take long times to be accepted universally. For example, Einstein published the Special Relativity at 1905 & General Relativity at 1915 at won the Nobel prize at 1921 mainly for discovery of the photoelectric effect. Do you see the differences among the mentioned years?

    5. Your remarks on Iran sound interesting. Anyway, due to the information I gave you, it does not seem impossible if such a technology would be realized therein soon. Therefore, I propose you to publish a post about it and state your comments more clearly. That would be awesome! ;-)

  11. I'm not concerned that he never spoke there, I'm concerned that there is no transcript of his speech, which would be of more interest to me than the fact that he spoke at a college. Anyone with an idea can speak at a college.

    Is his research published anywhere other than the Internet? Meaning, a book, or a scientific journal, or something of that nature that explains in simplistic terms what he is proposing and what his research is showing? Anyone can get on the web with a radical idea...

  12. Anonymous12:51 PM

    Just do an investigation by calling the UNM. Don’t hear me, hear them. BTW, concern to any interest you like! :-D

  13. A Plan to travel to Mars and back.

  14. Thanks for the link!