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MonstaMunch: A lightyear is a measure of distance, time is only used as a means of working out the distance of a lightyear, therefor why wouldn't it be possible?
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Darling_Jimmy: Yes, a light year is a unit of distance. It is the distance light travels in a year. It takes light 46 billion years to travel 46 billion light years. The universe is 14 billion years old. How can we see a light source 46 billion light years away?
A couple of things:
1. As has been pointed out, we aren't "seeing" this light at it's source. Depending on the source of light, there are various ways of estimating it's distance. For stars that aren't too far away, we use parralax calculations. That means taking readings of the projected location from different sides of earth's orbit to "triangulate" (not actually the correct term in this case, but it'll do) the distance. For things many billions of light years, there are techniques that involve analysing how bright the light appears to us, compared with how bright it would be expected to be at source (the main way of judging this is the "cephid technique").
2. Also as has been pointed out, the light we are seeing was generated a long time before we see it. For all we know, the light source could no longer be there (got eaten by aliens or whatever).
3. As has also been pointed out, the universe is contantly expanding at what seems to be an expidential rate. That means (as a very simplistic example) it could have only been 5 lightyears away when it generated what we are seeing now, but we can work out that by this stage it would be 10 lightyears away.

If that doesn't answer it, then it seems I've misunderstood the question :(
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JMich: the point will be moving faster than light in relation to us
"velocities" of galaxies or quasars can be above the speed of light
—Wikipedia




Holy crap! What?

They lied to me. Everything I have ever known. Lies.


Edit: Now I have all new questions I didn't even know existed. I'm not even sure what those questions are yet. I'm still too shocked. Hold on a minute. I need to sit down.
Post edited December 12, 2011 by Darling_Jimmy
Guys, aren't we supposed to use our gog knowlegde?

Those lights took the warp zones from Starfox.
Post edited December 12, 2011 by RightInPot
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Darling_Jimmy: Holy crap! What?
Nothing's actually moving faster than the speed of light.
Sure, the distance to distant objects is growing faster than the speed of light,
but that's "just" the universe expanding and doesn't count as moving.

Wrap your mind around that and you'll have a mind well wrapped.

All theories and crazy talk mind you.
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Darling_Jimmy: Holy crap! What?

They lied to me. Everything I have ever known. Lies.


Edit: Now I have all new questions I didn't even know existed. I'm not even sure what those questions are yet. I'm still too shocked. Hold on a minute. I need to sit down.
Just a bit of clarification, so your husband doesn't have a fit.
There is still no evidence of anything that can move faster than light. Even the "velocity" mentioned in the wikipedia article uses a specific definition of velocity. Unfortunately, my understanding of the theory is almost non-existant, and I'm not sure how many people can explain it well enough. This article tries to explain it, though I've only skimmed it so far. If you cannot download it, tell me and I'll upload it somewhere.
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JMich: Just a bit of clarification, so your husband doesn't have a fit.
There is still no evidence of anything that can move faster than light. Even the "velocity" mentioned in the wikipedia article uses a specific definition of velocity. Unfortunately, my understanding of the theory is almost non-existant, and I'm not sure how many people can explain it well enough. This article tries to explain it, though I've only skimmed it so far. If you cannot download it, tell me and I'll upload it somewhere.
Downloaded. I will make a courageous attempt to understand it.