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Originally Posted by rogerbo
...IMHO our main problem is that we look at it from our view and knowledge. As we know as futher away we go from the center of the universe as older the Stars get. We do know also that alot of Staers we see on our sky don't exist anymore cause of the Gigantic Distance, and we know what Einstein sayd about the travel with light speed. BUT is that realy so ???
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Probably. The thing is, although we certainly don't know everything about physics, we do know a lot. We have already figured out loopholes whereby Einstein's theories can be bypassed or avoided, BUT they all require so much energy that they are for all intents and purposes impossible.
The fact that we don't know everything is not the same as saying that we know nothing. After all, we're a lot more advanced than we were 300 years ago, yet Newtonian physics are still fairly reliable. As scientific knowledge develops what we're doing is refining our physical understanding, so we're not really likely to find anything that radically changes our understanding of how the universe works. Our view is somewhat biased and our knowledge is finite, BUT that doesn't mean that our view is completely false or that our knowledge is zero. In 500 years we might have a unified theory of physics, but Einstein's theories will still be a good model, as will Newton's. Trust me, we're not going to suddenly find that we can make an engine that needs a few gallons of gasoline that can take us to Alpha Centauri and back within an hour or two. Such a journey is always going to take at least decades unless we can develop a warp drive that would require the energy of entire suns to power a single 4 light year warp.
Let me put it this way: we have more likelihood of getting people to Alpha Centauri by making them live long enough so that a 5000 year space journey is survivable, than we have by making a warp drive.