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| Thread: Did you know? |  This thread is pages long: 1 2 3 4 5 · «PREV / NEXT» |
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Mentat
Disgraceful
Known Hero
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posted December 22, 2011 10:49 AM |
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Mentat: Image you are travelling close to the speed of sounds. The closer you get, the less of a warning you will get via your ears.
Now, in FTL or near "c" speed, the same applies. With FTL, you need to have some kind of method, how about a premapped starchart which gives a route on where you won't hit anything?
Or how about using FTL particles as radars? Providing they do work in such a way?
The starcharts alone would be good enough to FTL, the problems will be that you need to pay a cost in drones or blood to gather them.
Starcharts shows only stars and planets, relatively static things, while moving things like meteors, can not be charted. If FTL means short or long jumps through some alternative space or dimension then this is not such a big issue but if the FTL travel happens in the 'real space' charts are useless. For sensors we need something that is traveling in pure wave form as these things could be faster than light...
Quote:
Byt yes... rocks..... the non-relativistic 1/2mv^2 is sure a pest, and while its inaccurate at higher than 0.1c, its still a pest, and reffering to it as "atoms" in folds of energy is a really way of expression oneself.
I guess ftl sonars and perhaps shields, or some extremely odd unpredicted tech. Most likely it will fall on sonars.
Shields are good idea but which kind from the many?
"Well, if you generate a super dense wave that oscillate with more than 5x speed of sound then this dense wave wall starting to became a field of fast moving sub-atomic particles that have very usefull properties. They could stop, for example, fast moving matter like bullets, arrows, motor-cycles (well motors could hit you hard though...), so it could be really handy for you.
On the other hand this field of particles have certain backwards that you won't to experience ever in your short little life. Hit by laser or particle-based wave blasters (polaron-ray, graviton-ray, etc.) will cause a pseudo-atomic reaction as the fast flowing energy create a quick overflow of heat in the system what causes the particles to react with each other (collision, fusion) which results a fair little atomic explosion. And an atomic explosion what's center is you, could harm you very very hard."
This is how the most basic shields works (they considered obsolete around the 21.st century), and these kind of shields are good to protect against meteorites and other non-energy things. And against weapons? That's another issue we not need to talk about here and now.
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As for turning? In theory you can't do that with the current knowledge of science. While it does not take the full amount of energy used to gain such a speed in the first place, it will still be too much. Such a thing can't be done with our current knowledge of science, and its not a issue of crew or ships material strenght either, its just that it will take too long.
So most likely it will be speculative science, like manipulating inertia, or some extremely odd drive mechanic that ignores such problems.
Note: c means 3*10^8, or lightspeed as people like to call it.
The main problem, as you mentioned, is the material strenght. Energy could be created from nothing, even the universe do it as the quantity of energy in the universe growth continously (as do the matter). If we could figure out how the universe do this trick the energy won't be an issue anymore.
Inertial nullifiers could be a solution but these things, as speculative science may say, is problematic and way to complicated to integer them in a craft's systems that way that have effect on the crew to and not only on the craft itself. Personal nullifiers, on the other hand, are just such a big waste of precious materials that they are not even an option.
Hmmm... I think it's way enough for now. These topics are way boring and complicated for me. Girls like other things 
Seriously, I'm interested on some level in these things but this isn't my main profile. Such high-science is the necessary bad for me.
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del_diablo
Legendary Hero
Manifest
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posted December 23, 2011 12:54 AM |
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As far as I know, you didn't really read me post. I feel offended.
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Mentat
Disgraceful
Known Hero
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posted December 23, 2011 09:27 AM |
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Quote:
As far as I know, you didn't really read me post. I feel offended.
Sorry but I did read it!
Just think different ways than others, sorry. Don't feel offended, please! I'm not even start things yet! 
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del_diablo
Legendary Hero
Manifest
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posted December 23, 2011 04:33 PM |
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"The problem is not material strenght, but that it will take too long to change direction of the velocity when in high speed"
"Yes, as you said, the problem is material strenght"...
I still do wonder a bit about it.
Well, in space there is no air friction(well, there is still large gas clouds somewhere), so material strenght is irrelevant if it can stand the gravity the ship will generate while accelerating. And as "gravity" is roughly related to acceleration and not speed, if the material is not strong enough for rapid acceleration it can use more time to accelerate instead.
The problem is however that if you are going to hit something, you need to slow down and then change course. Its not a matter of the material or crew being able to stand it, its that you don't get warnings in good time, and you need to use several tons of energy just to slow down or change direction. Changing the angle 90* degrees means you must use the same amount of energy as it tok to get to the speed in the first place, under ideal conditions.
Besides: "Shields" are speculative science.
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moonlith
Bad-mannered
Supreme Hero
If all else fails, use Fiyah!
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posted January 08, 2012 10:16 PM |
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Pretty interesting read.
I always wondered about the possibility of such a cycle, that in due time everything in the known universe would be sucked up in a black hole before a 'big bang' would occur, starting the cycle all over again.
But I do wonder, if such a 'big bang' occurs, what exactly is keeping the matter within the same galaxy? What is stopping it from flying off into space?
Probably an interesting vid related to the thread's topic:
http://www.youtube.com/watch?v=Bcz4vGvoxQA
Have fun feeling utterly insignificant
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NoobX
Undefeatable Hero
Now, this is a paradox...
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posted March 02, 2012 07:58 PM |
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Good thread! I like all that science stuff and I think it's worth a QP.
Btw did you know that the black holes are bright from inside? It's becouse the black holes gravity force holds the light inside and it can't get out.
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OhforfSake
Promising
Legendary Hero
Initiate
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posted March 02, 2012 10:18 PM |
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If you travel faster than light and impact with an object, you'll have moved away from the point of impact before the impact is registrered. So it's not certain you'd impact, or more generally - interact, with anything.
FTL is also hard to imagine from the point of the traveller. The thing is, the closer you travel to the speed of light, the smaller the universe gets. The form of the universe is conversed independent of speed, but the distance between objects gets smaller, meaning basicly to avoid any FTL violation of non-FTL objects, travelling very close to the speed of light and the universe becomes really really small.
I don't know what should happen if you travelled faster than light. I mean, sure we can expand the equation to this area, like time going backwards, but we have no empirical evidence of these effects, because we're on the wrong side of the barrier. Alike Newtonian mechanics at high speed, we've no idea if the laws of relativity is applicable at these regions.
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shyranis
Promising
Supreme Hero
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posted March 02, 2012 10:23 PM |
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Faster than light travel?
Hubby saw this and pointed me towards this.
Quote:
Alcubierre warp-drives (theoretically) allow rocket ships to travel faster than the speed of light, while staying within the rules of Einstein's general theory of relativity. New research has shown that as such warp-drives zip through the universe, they gather up particles and radiation, releasing them in a burst as the warp-drive slows down. This is bad news for family and friends waiting for the ship to arrive, as this intense burst will fry them.
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Fauch
Responsible
Undefeatable Hero
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posted March 02, 2012 11:41 PM |
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why wouldn't there be an impact if you travel faster than light?
I just suppose that you wouldn't see most of what is around you, since light wouldn't be fast enough to reach you. you would also become invisible to people, provided that you are moving away from them.
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Salamandre
Admirable
Omnipresent Hero
Wog refugee
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posted March 02, 2012 11:48 PM |
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Maybe we should think from another angle, not about traveling faster, but slowing the time passing by. As far as I remember, I read the time constants are different when you are outside our earth and traveling at n speed. Our concern is the duration of galactic travels, if they could be compressed, then the speed is no more primordial.
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Era II mods and utilities
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Fauch
Responsible
Undefeatable Hero
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posted March 03, 2012 01:07 AM |
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the time is just a concept, no? that must be something else that is slowed down?
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NoobX
Undefeatable Hero
Now, this is a paradox...
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posted March 03, 2012 08:06 AM |
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I agree with Salamandre. There should be a way to slow down the time, or at least be faster than it. Time is the key factor in this story and becouse it passes, we grow old. If I heard correctly, we wouldn't even get out of the Milk Way even if we traveled with the same speed as the speed of light becouse of our lifespan.
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OhforfSake
Promising
Legendary Hero
Initiate
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posted March 03, 2012 11:48 AM |
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If the astronaut travels sufficiently near light speed, the problem is not his lifespan, but the lifespan on everyone on Earth.
It's because time moves differently depending on the velocity you accelerated to.
For the astronout, maybe a few years has passed while he's travelled through the galaxy at near light speed, while on Earth, a million years have passed (I believe the galaxy is about a million light years across). The problem as such is not from the point of view of the astronout, but from the point of view of Earth, who still have to wait a million years.
I suppose technically one could acceralte the solar system up to speeds near light making millions of years go in a few years. Since the universe is believed to have an "expiration date", which I believe is either in billions or trillions of yeas and if each year is equivalent to a million years, well then we'd only have around a million years left. Not to mention that we'd be very exposed to all those who're advancing a million years while we're only advancing a single year.
Something I always wandered about though is that if there technically could not exist objects in the universe, from which frame of reference everything goes much slower. In other words, maybe we're already accelerated and the expiration date of the universe as we percieve it, will be a lot longer from another point of view.
About the impact and faster than light travel. It's not only our sight, which is depending on the speed of light (it's actually slower, because it has to be processed through the brain, but nevermind that for now). Time itself is relative to the speed of light. Here time is supposed to mean the rate of reactions/interactions. E.g. take gravity. The gravity our Earth experience from the sun is not instant. The gravity waves emitted by the sun moves at the speed of light. In other words, if the sun dissapeared now, not only would we still see the sun for 8 more minutes, but the Earth would "feel" the sun as well. Nothing would have changed. All in all, no interaction will happen faster than the speed of light, as I understood it, meaning if you travel faster than light, at the point of impact (interaction) with any object, you'll already have moved away from the point of impact, before the impact have occured.
This is all of course only theory. We can't test this region because we don't know how to travel faster than light in a way which violates the theory in the first place (unless the particles were always faster than light). So it's really only an expansion, until we maybe one day interact with ftl particles at which point there of course would have been an interaction and it'd have been incorrect to assume no interaction could happen.
@Shyranis
I heard of it too. Sounds really cool! I don't know the details, only got the general explanation that in stead of moving the space ships in its frame of reference (which I believe is another word for velocity), it's the space around it, which expands and contracts.
I'm not certain if space is expected to be able to move faster than light. In the formulas for the expansion of the universe which I've seen, it seems like the acceleration will go beyond light speed. At this point I imagine, from our point of observation, the starts at the limit of our observation radius will look stationary. Which is something that honestly always bothered me a little, but I guess it's maybe because space is not matter and it's matter which is unable to be accelerated up to light speed.
Also there was something about it required enormeous amounts of energy. I don't know how to set it in perspective, because I don't know any measure of curvature of space made by, e.g. the Sun, compared to the amount of curving required for making a space ship "go at ftl".
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Darkshadow
Legendary Hero
Cerise Princess
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posted March 03, 2012 12:46 PM |
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Hasn't there been speculation that time would appear to go backwards if you traveled faster than light? 
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NoobX
Undefeatable Hero
Now, this is a paradox...
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posted March 03, 2012 01:20 PM |
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But thats what I'm talking about - our lifespan on Earth. It's too short! But if we could get the Earth with us... And still live without our Sun, we would make it somewhere. But that's only the thinking of today! Maybe we'll discover something tomorrow that will change this all...
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OhforfSake
Promising
Legendary Hero
Initiate
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posted March 03, 2012 01:56 PM |
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Okay! Sorry about misunderstanding you then!
Well, I suppose we'd have to manage to solve the mechanics of aging, rid ourself of disease, and find ways to deal with physical damage, etc. then.
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NoobX
Undefeatable Hero
Now, this is a paradox...
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posted March 03, 2012 06:53 PM |
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Exactly. We need to find a way to stay young forever, stop illneses and we'll be able to travel space no mather what.
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Drakon-Deus
Undefeatable Hero
Qapla'
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posted March 03, 2012 06:54 PM |
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Did I know? No.
Anything else?
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NoobX
Undefeatable Hero
Now, this is a paradox...
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posted March 03, 2012 09:10 PM |
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I think that we should wait for Duke_Falcon to post something new. Not that this is getting old, but there is nothing left to disscus (only guess). But hey! That's just my opinion.
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NoobX
Undefeatable Hero
Now, this is a paradox...
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posted March 04, 2012 05:56 PM |
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Well, I'll give you something to think about.
How was everything made? How did our universe came to be?
We know that the Big Bang spread the material for creating the galaxies, stars, planets, but what has created the Big Bang if there was nothing in the begining?
This will be the ultimate test that we must pass if we are to be superior beings in this world (World = everything around us). Let's see what you think about that!
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