Oh, dear God. What an unholy can of worms have you opened, Divals?
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Originally posted by Commander Arashi:
**Anyone care to work causality violation into an EVN plug-in?
**
I'll see what I can do... No promises, but, I'd like to think I'm a halfway decent SF writer... And I'm fairly up on current physics theories, esp. superstring and M theories. Besides, if they don't work, I can just make a new one of my own...
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Originally posted by what_is_the_matrix:
**Oh, and if I remember correctly, string theory is supposed to indicate like 20 dimensions.
Matrix
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Uhm, actually, it's 7 spatial dimensions above our own four (to repeat QT, three spatial, one temporal). However, these seven are curled up into a tiny sphere with a diameter the size of the Planck length (10 ^ -33 cm). That's easy enough to grasp, right? True. The tricky part lies in figuring out how that thing, which borders on the maximum size for it to disappear in the quantum foam, can contact every single point in the Universe (over 20 billion lightyears across, so far), simultaneously. It's kinda like trying to lick your elbow; our poor little pee-brains can't handle it.
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Originally posted by what_is_the_matrix:
**The May 2001 issue of Popular Science had an article on various theoretical methods of hyperlight propulsion. All of the theories of interstellar travel require stuff to happen by "undiscovered means," but it's interesting nonetheless.
The first is an "Induction Sail" which is propelled somewhat passively by concentrating interstellar radiation on one side of a sail, causing a differential of "radiation pressure" that propels the ship. Of course, the device that concentrates radiation is undiscovered.
The second is a "Differential Sail" which is more passive than the Induction Sail. It absorbs interstellar radiation on the leading side of the sail and reflects it on the trailing side. The collisions of radiation on the trailing propel the ship. Of course, I'm not a physics major, but even if radiation were absorbed on one side of the sail, wouldn't it counteract the collisions on the opposite side?
The third in the passive propulsion series is the "Diode Sail." This seems the most plausible to me, but what do I know. Basically, it acts as a one way mirror to radiation. Radiation approaching from behind is reflected, but radiation from the front passes through. Of course, all three of these sail ships depend on that space has a lot of background radiation.
**
My dear Matrix, you have just succeeded in describing one of the favorites of SF authors, the Solar Sail. The 'Induction Sail' is a highly polished aluminum radio antenna (the kind you see outside of a TV station, but more along the size of Arecaibo(sp?) in South America). Except here, instead of the thing suspended in the middle being a receiver, it's a very very very powerful laser. Several variations on this theme have been tested by NASA. None have panned out so far. The 'Differential Sail' is a traditional solar sail. A highly polished, incredibly thin sheet of aluminum whose leading face is painted a flat black. Of course, the paint would have to be as close to true black (completely nonreflective) as possible. And no, absorbtion is not the same as reflection. With reflection, some of the energy in the photon is imparted to the sail (which itself is attached to the starship) as the photon bounces off. With absorbtion, the photon simply stops dead. The 'Diode Sail' is the same as the 'Differential Sail', except it uses a one-way mirror instead of a mirror whose reverse side is painted black.
Their 'Bias Drive' is similar to warp drive. Project an incredible gravitonic field just in front of the ship. Just make sure that the grav field stays in front of the ship, or else said ship becomes a miniature nebula. Kinda like sticking a carrot on a stick, and holding it out in front of a horse. The ship falls towards its destination. Move the grav field, change the direction in which the ship is moving.
'Disjunction Drive' may rely on the theoretical particles of either the Weak Nuclear Force, or the Strong Nuclear Force, I can't remember which. Point being, you take two particles. These two particles are connected by this force, which only strengthens exonentially with distance. Put one particle on board your ship. Chuck the other one at your destination near or at the speed of light. Your ship promptly follows.
rmx256, only one problem. One fellow, a Russian emigré scientist now living in Finland, named Eugene Podkletnov, has claimed to have reduced gravitonic effects by as much as 2%. (BTW the name for the particle is 'Graviton') Don't quote me on the exact amount, but it's admittedly pretty small. Okay, more like tiny. But the guy's done it. A lot of people have ridiculed him, but he's got a believer here. The facts fit together, and it just plain sounds right. If he's lying, sue me. I dare ya.
Skyfox, tachyons are nice, but nobody's ever even been able to see one for a tiny fraction of a second. Besides that, they're only used in theories to explain things that can't be explained otherwise, and they've been out of use in modern astrophysics for a while. I admit, they're cool, but I'm not too terribly sure they actually exist. Sorry.
Colours, you are quite correct about something going wrong with those electromagnetic fields holding the black hole in. Actually, a good idea for a weapon is to take a substance, anything from hydrogen to neutronium, stuff it in the nose end of a rocket, and then shoot said rocket off at nearly the speed of light towards a star or some other big thing that you want to go away. As the speed of the missile increases, so does the mass of the 'warhead'. When it reaches a critical mass, the entire thing collapses into a small black hole. Now, normally, due to Hawking Radiation, this black hole would dissipate well inside of a second. However, if it's close enough to something big, like a planet or a star... And besides, if you're desperate enough for artificial gravity that you're willing to put a tiny black hole on your ship, just spin the damned thing.
Impatiently awaiting your replies. Have a good week.
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“You’re only given a little spark of madness. You mustn’t lose it.”
-- Robin Williams