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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573117 -

It looks like it would take a little under a year at 1 g acceleration (for the stationary observer). I suppose you'd have to double that to slow back down.

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Re: You know the earth lights up at night and is visible from space? [Re: Asante]
    #16573124 -

Wiccan_Seeker said:
These communities will have to be intensely peaceloving and coooperative or they won';t last the journey.


Woodstock, lets send Woodstock.


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Re: You know the earth lights up at night and is visible from space? [Re: psi]
    #16573243 -

psi said:
It looks like it would take a little under a year at 1 g acceleration (for the stationary observer.


Yes, but in order to accelerate constantly you would have to increase the Force continously as you approach the speed of light. The amount of Work your engines would have to perform for that would be crazy.

Quote:
I suppose you'd have to double that to slow back down.


That doesn't make sense. Velocity is relative, acceleration is absolute.


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Stand up. You're not alone.

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Re: You know the earth lights up at night and is visible from space? [Re: Lord_McLovin]
    #16573300 -

Not sure what you mean. Wouldn't you have to slow back down before reaching your destination so that you didn't go past it or smash into it (unless your destination was itself moving away from you very fast when you started)? If you didn't want to exceed 1 g at any point, you'd basically have to spend as much time slowing down as it took you to get up to speed.

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Re: You know the earth lights up at night and is visible from space? [Re: psi]
    #16573309 -

Right, you flip over at the midpoint and decelerate.
A badass pilot can do it as a skew turn and not have to shut off the jet.

Robert Heinlein spent a good bit of time working out the math and used the idea in several of his novels.
I think Time for the Stars probably goes into the most detail. Also Farmer in the Sky.


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You make it all possible. Doesn't it feel good?

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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573536 -

Quote:
If you didn't want to exceed 1 g at any point, you'd basically have to spend as much time slowing down as it took you to get up to speed.


Ahh, you were talking about doubling the time. :grin:
Yes, you are correct.


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Stand up. You're not alone.

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Re: You know the earth lights up at night and is visible from space? [Re: Lord_McLovin]
    #16573560 -

OK I see now, yeah my original statement was pretty vague now that I look at it.

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Re: You know the earth lights up at night and is visible from space? [Re: SoreSpore]
    #16573563 -

SoreSpore said:
Doc_T said:
2) we could start working on a star ship with today's technology


  So if we were traveling the speed of light, it would still take us 36 years to get there.


We could build a generation ship and go to the stars over decades or centuries.
We don't really have a propulsion system just yet, but we could by the time the rest of the ship was ready if we worked on it.
and really, it wouldn't be all that terribly expensive as big projects go.


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You make it all possible. Doesn't it feel good?

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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573586 -

Lol...it would be incredibly expensive...and we don't have many of the technologies that would be needed...

Not to mention the fact that we would be sending people to live in a box for generations, headed to someplace that probably is little more than a rock...

I can't imagine a bigger waste of time, money, and other resources.


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Censoring opposing views since 2014.



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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573592 -

I guess the other classic sci-fi solution is to figure out some way to keep people in stasis for long periods.

It seems like a big stumbling block for space projects right now is the extreme energy cost of getting equipment up there by rocket. I wonder if the "space elevator" concept or similar ideas  will ever become a reality. Different engineering hurdles but it would take a lot less energy to get stuff up there if you weren't pushing through the atmosphere at extreme speed.

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Re: You know the earth lights up at night and is visible from space? [Re: Enlil]
    #16573617 -

Enlil said:
I can't imagine a bigger waste of time, money, and other resources.


That's what they told Columbus and Magellan. :lol:

...

Really not that expensive. And the technology to build the structures exists, it's not much different from a submarine.
People live a long time in isolated conditions- islands have small populations that stay stable.
It wouldn't be that hard to make an artificial structure that could house say, 10,000 people.

What you find when you get to the destination is a great discussion.
Cool thing about a generation ship is that if you don't like it when you get there you can just keep on truckin'.


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You make it all possible. Doesn't it feel good?

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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573625 -

And countless other people who didn't get as lucky...

You're out of your mind if you think that building a spacecraft to house 10,000 people for hundreds of years wouldn't be expensive...



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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573635 -

Doc_T said:
Enlil said:
I can't imagine a bigger waste of time, money, and other resources.


That's what they told Columbus and Magellan. :lol:




Looks like a 'they laughed at galileo' fallacy to me.


Nobody told Columbus and Magellan that they would have to live in a box for generations to wind up at a rock not suitable for human life.

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Re: You know the earth lights up at night and is visible from space? [Re: DieCommie]
    #16573646 -

People coming to the New World from Europe spent weeks or months in small, dangerous boxes for the chance to step out on virgin shores.
Raising your family in a space ship wouldn't be any weirder than living in Antarctica, or even a big city like Tokyo or New York.

It's easy to scoff at space travel. At the same time, it's closer and more feasible than it might at first seem to be.

Quote:
You're out of your mind if you think that building a spacecraft to house 10,000 people for hundreds of years wouldn't be expensive...


As big projects go, not all that terribly expensive. And you get to spread the cost over decades.
Not cheap by any means, bu well within our possible budget.


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You make it all possible. Doesn't it feel good?

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Re: You know the earth lights up at night and is visible from space? [Re: Doc_T]
    #16573656 -

No...it's much farther than that...

How are you going to feed 10,000 people for hundreds of years? 

You're dreaming...you clearly haven't thought this out at all.


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Censoring opposing views since 2014.



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Re: You know the earth lights up at night and is visible from space? [Re: Enlil]
    #16573660 -

Quote:
You're dreaming...you clearly haven't thought this out at all.


Yea, its a stupid idea.


Give it a couple thousand years and maybe artificial intelligence may want to make the journey.  Though I cant imagine why.

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Re: You know the earth lights up at night and is visible from space? [Re: Shroomism]
    #16573663 -

Shroomism said:
yeah cause intelligent beings that can travel millions of light years through hyperspace are going to be war-like I'm sure /sarcasm
1. Because most war civilizations usually don't make it to hyperspace, they usually destroy themselves before they get that far. You don't progress for millions of years of evolution by being destructive
2. Any species capable of intergalactic space travel obviously has technology 100000x superior to ours, if they wanted to wipe us out in a single blink they could and there would be absolutely nothing we could do about it.
3. We would already be dead

So yeah I know you were being facetious but I felt like poking holes in that because I fucking hate that presumption that people think aliens would be malevolent like we are. Too much fucking Independence Day and Men in Black.



Indeed

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Re: You know the earth lights up at night and is visible from space? [Re: DieCommie]
    #16573672 -

DieCommie said:
Quote:
You're dreaming...you clearly haven't thought this out at all.


Yea, its a stupid idea.


Give it a couple thousand years and maybe artificial intelligence may want to make the journey.  Though I cant imagine why.



Use your imagination. Because we programmed them to make the journey DUHHH :smirk:

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Re: You know the earth lights up at night and is visible from space? [Re: Enlil] * 1
    #16573676 -

Enlil said:
How are you going to feed 10,000 people for hundreds of years? 



Hydroponic farms.

We need a few new technologies to make it happen, fusion power being the most obvious.
But we'll get those technologies in the coming decades. Meanwhile, we can start designing and building the part we can build.

It's big, it's expensive, but somebody is going to do it, and sooner than you guys think.
People have always gone and explored things, it's built into us. We'll go explore space.

This was fun for a while, but when people start calling people stupid it's less fun.
I'll leave this discussion alone and you guys can go feel smug and superior.


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You make it all possible. Doesn't it feel good?

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Re: You know the earth lights up at night and is visible from space? [Re: DeadHearts]
    #16573686 -

Dont get butthurt.  I happen to think its an extremely stupid idea.  :shrug:

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