Thank you evan_au that answers a lot of my questions and ideas that have been rattling around for a long time!! I've read, and seen tv programs, suggesting there are more than the dimensions we know of and theoretically being able to bend time but i've never given them much thought as it seems like we would need a vast improvement of knowledge to even disprove those theories, though i did see an interesting tv program once stating that creating a 'portal' at a current point in time, you could enter the portal in the future and come out at the time it was first created, and according to the physicist on the program (i cant remember his name but i enjoy his programs) said that scientists have proved that it is possible but the massive power requirements and technology are far beyond us at this point in time.
As for the sleeping reading generally keeps me awake longer as if i get into a good book i end up not putting it down. I think the sleep thing is more subconcious than anything, a lot of stress in my life at the minute (considering i dont work i feel silly saying that lol)
I did think that maybe gas giants would be an easier source but gas giants are usually made up of a mix of gasses that would need processing and on a space craft that would take up precious space, not only that but the one constant when travelling to other stars is the stars themselves, not all stars have planets and neither do they all have gas giants so the stars themselves would be a more reliable source, however travelling in our own solar system they would be a good fuel source.
Is there ways to produce hydrogen? I know that you can get hydrogen from water using electric current but at what point if ever does the water regain hydrogen? If there was a way of producing hydrogen then it would make a renewable fuel that can be produced on the craft in transit, rather than relying on rare elements you may or may not find during exploration?
Travel at the speed of light is not a theoretical challenge: in principle you could locate the position of every atom in a person's body, encode that onto a laser beam, and send that to a receiver which would reconstruct every atom in its original position. Far beyond current technology, but not forbidden.
This is what i've never understood about teleportation technologies, if its a case of saving the atoms of a person, then transmitting them, then reconstructing them, in my mind wouldnt that make an exact replica of the person rather than 'moving' them... To teleport them you would need to destroy the atoms as they entered the 'memory' of the teleporter however that screams accident waiting to happen, if you abort a teleportation early.
The challenge that is beyond current physics is to make the transition between traveling slower than light and going faster than light. If you try to do it by rockets, it would take all the mass in the universe and you still wouldn't be going faster than light.
I understand that A. In order to go faster than light you would have to either artificially make the mass of the craft finite in order to be AT or travel faster than light and B. that in order to slow down you would have to use the same amount of force in the opposite direction.
If tachyons are proven and they ONLY travel travel faster than light, then could they thoeretically be used as a force? Rather than a craft using a fuel for long distance travel, use dark matter + anti-gravity + FTL atoms like tachyons, for travel, I mean i know that all 3 of those are only really thoeretical right now (except dark matter which we know is there as we can see its effects) Dark Matter could be used to create anti-gravity and the craft could latch onto tachyons to pull it up to speed?
The theories in my mind are getting a little jumbled now, one of my old ideas was to use dark matter as propulsion as it could theoretically push you away from a mass at relatively high speed but i chucked that idea as though you could use the same dark matter to slow down would require that your aim is very accurate because if your off you could just keep on going and never reach an object with sufficient mass to slow you down.
It sounds silly but i always thought deutirium was fictional (seen it in too many games i suppose) Its created from water isnt it?
We don't have a solution to this today, so many science fiction writers gloss over this aspect of interstellar travel, or speculate about travel through another dimension, which is theoretically possible (even if we have no idea how...).
I find it great that although they are science fiction writers, a lot of the ideas DO seem theoretically plausible. Some theoretical physics i saw on a tv program (same one i keep mentioning) that all matter is in two places at the same time where it is and where it is going, do you think its plausible to suggest that if matter can exist in two places at once, we will eventually be able to wedge the gap between the matter and push the atoms so that instead of being close they would be far away, thus teleporting without the need for transmitting a persons data? Only calculating the position of their atoms then pushing them to another location?