posted before i think this is bunk
anti gravity is just falling in the opposite direction. Meaning it still acts like gravity. You shouldn't be able to tell the difference between an anti gravity device at your feet and a gravity source at your head.
This idea really depends on gravity becoming anti gravity at very large distances. Why? because other galaxy clusters are receding from our local group at 57%c and faster. Dont get started on they aren't really traveling at 57%c. As "really" has no meaning with motion,time,space. (well except for Amrits universe as with an aether you can say really.. i suppose anyway don't really know his theories that well but don't discount them either). From our perspective they are traveling at 57%c and from this distance then gravity should be anti gravity. If you accept gravity as a geometric deformation of space, like valley, then anti gravity would be like would be like a hill. If you were in a spaceship leaving the local cluster, (as thats how far you got to go to feel the effects) gravity from the local cluster would get less and less and if you started to run into anti gravity.. it would seem to you like the gravity of the local cluster suddenly started to increase again. You wouldn't be pushed away from our local cluster because you would be heading into an area of increasing anti gravity (climbing a hill), so you would be pushed back towards the local cluster. Unless you subscribe to a valley behind you suddenly becoming a hill.
OK bizarre but i can almost except this especially if you think the natural shape of space is bowed.
But there seems to be implications for this theory that just don't make sense. Wouldn't objects falling towards a backhole all of a sudden be repelled once they reach 57% of light speed? It would make the terminal velocity of a black hole 57%c and not c, as when you get above this number anti gravity would slow you back down to 57%c. Could a black hole even form if a star cant collapse at near c? On a spaceship once you reached 57%c. you would have to turn you engines on reverse to prevent constantly accelerating to c. This makes it seem like free energy. Maybe i am reading something wrong here but this definitely doesn't make sense.
I suppose he is only talking about particles that have a rest mass. This is so light and other EM doesn't have anti gravity properties. Or it wouldn't fall in black holes and would be deflected from planets. I know we don't have a good idea of gravity on the quantum scale but i also wonder the implications for particles that have a rest mass and do travel at near the speed of light.
I really don't know how he came up with his numbers so i am just guessing here but from first read it just doesn't make much sense. Does that make it wrong when so much of the universe doesn't make sense?
*message to the developers.. i really wish the spell check would quit trying to change my donts to dints. lol
If a spaceship was speeding towars a blck hole the antigraity beam projected
from the front of the ship would tend to push the black hole away from it but the black holes gravitational force would be much bigger than the repulsion from the spaceship. Two black holes of equal mass accellerating
towards each other would repulse each other and possibly bounce off each other if the theory is correct.
lO
16th February 2006 - 01:51 AM
MAIN ISSUES ARE THAT GRAVITY DOES NOT INTERACT WITH OBJECTS ONLY THE SPACE AROUND THEM AND
THE CLOSER YOU GET TO THE SPEED OF LIGHT THE MORE MASS DEVELOPED.
THE PARADOX IS THAT THE MORE MASS ONE IS THE MORE ONE CAN APPROACH THE SPEED OF LIGHT AND THEN THEREFORE MAKE IT TO AND THROUGH SINGULARITIES INTACT, WITHIN BOTH LAWS OF GRAVITY, CLASSICAL AND BLACK MATERIAL.
See
http://ljo80203.tripod.com/
Neil Farbstein
16th February 2006 - 01:52 AM
QUOTE (Guest+Feb 13 2006, 11:36 PM)
What's for lunch?
Jimmy Hendrix hey joe!
LyNYRD SKYNRD MR> SATURDAY NIGHT SPECIAl
JOHN BARLEYCORN MUST DIE!!!
Arts Student
16th February 2006 - 07:14 AM
Admittedly I am no physicist, or anything of close resemblance, possessing only a rudimentary knowledge of the field. I do however have a couple questions that come to mind, and hopefully am not being superficially critical of something i have little to no knowledge of.
1. I have noticed everyone emphasizing the importance of 57% of the speed of light. How does one to propose to regulate the speed of any sort of craft travelling in this manner? If 57% is so crucial, is maintaining this speed a primary concern.
2. As for the discussion of gravity and antigravity, it seems as if some members propose a cancellation effect. If this is so, would they compensate adequately for each other during acceleration/decelleration? Or is there a threshold at which one begins to manifest itself?
3. The issue of originally accellerating to a point that one could ride on an antrigravity beam (sorry for my atrocious laymanship) is of great importance, as I question if the planet itself contains enough material that could be harnessable as a fuel source to initiate this trip, and if it did, would it be so much that it would be effectively impossible amidst the realities of the human existence.
blue_bottle
16th February 2006 - 08:53 AM
QUOTE (Arts Student+Feb 16 2006, 07:14 AM)
Admittedly I am no physicist, or anything of close resemblance, possessing only a rudimentary knowledge of the field. I do however have a couple questions that come to mind, and hopefully am not being superficially critical of something i have little to no knowledge of.
1. I have noticed everyone emphasizing the importance of 57% of the speed of light. How does one to propose to regulate the speed of any sort of craft travelling in this manner? If 57% is so crucial, is maintaining this speed a primary concern.
2. As for the discussion of gravity and antigravity, it seems as if some members propose a cancellation effect. If this is so, would they compensate adequately for each other during acceleration/decelleration? Or is there a threshold at which one begins to manifest itself?
3. The issue of originally accellerating to a point that one could ride on an antrigravity beam (sorry for my atrocious laymanship) is of great importance, as I question if the planet itself contains enough material that could be harnessable as a fuel source to initiate this trip, and if it did, would it be so much that it would be effectively impossible amidst the realities of the human existence.
No worries about not bein a physicist. I'm not that up on it. We just all havin fun!
Firstly, to combine 1. and 2., I can only assume that 0.57c is the threshold limit and thats why it's so important. The antigrav force is so weak, that it's unlikely it could become manifest at anything short of this speed.
Secondly, all we really need is a sufficient power source to power our ship and it could reach such speeds. Some people on the forum have mentioned antimatter, which I am sceptical of to say the least, but it is subtly feasible (SUBTLY! I really don't like the idea.) I prefer cold fussion which if possible would essentially mean power from beggar all.
That would be grand!
Gonzalo
16th February 2006 - 10:29 AM
QUOTE (TerrorBite+Feb 15 2006, 05:33 AM)
QUOTE (Guest_David+Feb 12 2006, 03:55 PM)
... there is a fallacy being perpetuated by this work and by this discussion. There is no special frame of reference in the universe according to Special Relativity, which General Relativity supports. So, if an object is going 90% light speed, then according to the object, the other observer is going 90% light speed. So, whatever is observed by one, will also be observed by the other.
We say "Nothing can go faster than the speed of light" - the speed of light
relative to what frame of reference?

Is it better to say "Nothing can be observed to go faster than the speed of light"?
If observer A sees two spaceships, B and C, approaching one another at 0.7c, this doesn't mean B sees C approaching at 1.4c, but instead something under 1c, maybe 0.9c.
So how do we specify "faster than the speed of light"?
Really?
Do you know Einsteins special relativity?
It's not so difficult, but its different from Galileo's relativity, that is what you are talking about adding the speeds directly when changing from one space ship to another.
The speed of a photon is the same for every space ship, independently of their relative movement. The energy of the photon is what will change from one observer to the other, but not the speed
drl711
16th February 2006 - 11:33 PM
Has anyone seen his actual presentation or paper. Has it been published yet ?
someguy
17th February 2006 - 01:56 AM
First of all if I was to go at a fraction of the speed of light, and like the article says it will repel mass. Wouldn't that mean I would get torn apart into particles?
cefarix
17th February 2006 - 02:07 AM
I read his paper online from arxiv.org and from what I can gather the concept does make sense. Look at this way:
You are very far away from a black hole, and you watch an object fall into the black hole. As this object gets closer and closer...it will actually appear to fall
slower, until finally, you see it frozen at the event horizon. In fact, to be precise, you won't even see it hit the event horizon, since it goes slower and slower...the fall to the event horizon, from your remote perspective, will take an infinite amount of time. This is a result of gravitational time dilation.
Now do a perspective shift, and view the same thing, except that your moving past the black hole (or, the black hole is moving past you). You will see the object again fall toward the black hole...eventually the gravitational time dilation becomes very noticeable, and the object's fall is slowed. It will eventually slow down enough that it starts to travel in the same direction as the black hole. When it (almost) hits the event horizon, it will be travelling past you at the same speed as the black hole, even though in the beginning it was travelling the opposite direction and towards the black hole. I guess the concept that he puts forward in his paper is that if you get the black hole (or whatever "pusher" mass) travelling fast enough (~0.577c), the gravitational time dilation rises sufficiently fast to completely halt the fall of the object towards the pusher mass completely, as seen from a distant observer with respect to whom the pusher mass is moving.
I'm not an expert on GR, but that's what I made of it
it's beautiful if true
17th February 2006 - 06:34 AM
QUOTE (Bgantcd+Feb 14 2006, 08:57 PM)
First of all, When you reach top speed how are you going to control the craft
And secondly how will you slow down
Reading both of the papers linked-to by page 2 of this discussion, I forsee some answers. The predicted 'antigravity beams' are fairly narrow (but not too narrow), and one may be able to ride the edge of a beam and then use one's own fuel to shift out of one beam and into others, or simply across them, at just the right times. (This would require precise knowledge of where the intersections are and also careful timing, but there is a precedent for that: a 'gravitational tube highway system' has been found to exist throughout our solar system (calculated using conventional physics, and recently reported by the mainstream science press), in which small amounts of fuel can allow a spacecraft to shift from one partial orbit to another to another so as to achieve nearly free motion across vast distances ... and it's so feasible and useful that it has been already been done in practice.)
Another important point made by one of the papers is that a very fast-moving projectile could slow down simply by 'aiming' itself direclty at a convenient massive body such as a star, which need not be fast-moving itself: it is only the relative motion that matters! (This 'repulsion' effect would cease once the relative velocity falls much below 58% of c, but it could still be extraordinarily helpful at high velocities. To slow down further, a ship would wish to be headed towards a star moving very fast towards or away from the ship, since a weaker repulsive effect is predicted even from bodies moving quickly away.) So a combination of moving towards some massive bodies and arranging to be in line with the motion of others provides a set of 'currents' that one could 'ride' across vast distances PROVIDED there are enough suitable intersections and provided it is feasible to switch between them, even in a roundabout way. I am concerned that these interchanges might not be practical to predict long enough in advance, especially at the start of a long mission -- precise knowledge of the masses and motions of stars would be needed. But for this there may be solutions as well: it seems this information could be detected en-route, by carrying accelerometers and telescopes to take continuing measurements of stars and black holes that are encountered ... or perhaps by scattering a large number of tiny probes carrying transponders, and recording exactly what happens to them. A database might be built up by exploratory probes of either of these types and then radioed back. Once the patterns are known for a region of space, they can be projected into the future so that useful routes can be calculated as needed. For a chance at practical navigation through the galaxy at very favorable speeds, this degree of effort seems entirely reasonable, given a long enough time scale.
cefarix
17th February 2006 - 07:28 AM
If the discovery holds out to be sound, then I have an idea for a machine that can produce an antigravity beam (so you don't need black holes or such). Since the idea is that any mass can produce this beam, provided its travelling > 57%c, and the faster you go, the higher the gravity beam, you could use an electron beam to produce the antigravity beam. A solution might be to have a huge electric current (massive amount of electrons), apply a huge voltage to them to accelerate them to velocities > 99%c. This would happen inside some sort of vacuum tube. The electrons are injected at one end, and retrieved at the other, as in a regular circuit. The beam of electrons would then project a continuous antigravity beam.
it's brilliant if not crazy
17th February 2006 - 07:39 AM
There seems to be a major misconception in many of the posts. It's not necessary to get your own spaceship up to 58% of the speed of light. If there are 'antigravity beams' in your vicinity, meaning that other objects are flying towards you at 57.7% of c or faster (and in a direction you would like to go), then you can gain momentum from them using the process, even if you start out motionless.
In the same way, you don't need to decelerate yourself down from 58% of light speed. The original effect can be used in reverse, as long as at your destination there are suitable objects flying towards you in the other direction, so that you can be headed towards them.
And you never need to reach 58% or 90% of c or any specific speed. You could choose to move out of a beam once you've reached 20% or 70% or whatever suits your needs. You could move out under your own power or by drawing upon another beam intersecting the first one. (Even 'stationary' stars create 'beams' if you are moving fast enough relative to them, which should greatly increase the number of possible interactions available when traveling at high speeds. Not all of those interactions would be desireable, though.)
The effects even work if the massive objects in question are flying quickly away from you, but then the repulsion you would feel is only 50% as strong or less, if I remember the papers correctly. It might seem safer to use this scenario, since you wouldn't risk crashing into your driving mass if you failed to move out of its way in time.
I suggest reading both papers. They complement each other in some ways. See the 2 adjacent links on page 2 of this discussion. Even if you don't understand formulas or the symbols being used, you can get a great deal of understanding just by reading the surrounding text, although these particular papers have less discussion in English than many do. (Of course, you are then trusting the author to do the right calculations and to draw the right conclusions. Which may be as risky as spaceflight in some cases!) As with anything, your amount of understanding* will rise as you read more and more papers of this sort. (*But, with physics, your total amount of confusion about the universe overall will also grow over time -- you have been warned! My surgical team offers discount lobotomies as a possible remedy.)
I also suggest considering robotic spacecraft carrying libraries of information including DNA sequences if you like. They can be much smaller & much more fuel efficient, and if one has enough of them flying similar routes, one needn't worry as much about potential impacts along the way (nor about overheating from the stars they may approach closely). When good destinations are reached, the craft can recreate just about everything you know and love about life on Earth.
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