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Post by darthroach on Apr 19, 2017 12:57:03 GMT
You don't need a really large mirror, you can make do with millions of smaller mirrors. If you have a perfect dyson swarm, all you have to do is make everything with mirrors on one side of the star shine the reflection toward a single point in the sky, and you have a laser with half the power of the star. It's a bit more complicated than this because there will realistically always be overlap and losses and such, but it's perfectly possible without needing gigantic mirrors. Maybe, but i just doubt if human need all these thing before the sun dead/too large to make earth and mars unhabitable... It's an exponential growth process. It would take about a decade to build the first permanent infrastructure in orbit - l5 shipyard and habitat is an often discussed example - but as you have one, you can build another, and then another and so on. Each new habitat makes it easier to build new ships, factories and habitats. Some estimates I've seen claim it's doable before the end of the millenium, starting tomorrow.
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Post by samchiu2000 on Apr 19, 2017 14:17:06 GMT
Maybe, but i just doubt if human need all these thing before the sun dead/too large to make earth and mars unhabitable... It's an exponential growth process. It would take about a decade to build the first permanent infrastructure in orbit - l5 shipyard and habitat is an often discussed example - but as you have one, you can build another, and then another and so on. Each new habitat makes it easier to build new ships, factories and habitats. Some estimates I've seen claim it's doable before the end of the millenium, starting tomorrow. Well human develop and build new stuff because they need to, and i think the main reason of need is because of population bloom. And with counties became more advanced and it's citizen more educated, the population may cease to grow or even decline, like today Europe. With the resource back in solar system already sufficient to support the population, and threat like asteroid impact can be altered, and interstellar colonization in fact, actually is a waste of resource and almost have no benefit to the homeworld, due to sheer distance which make effective trade and communication improbable, so these huge infrastructure isn't economically practical to build. So we just don't need such infrastructure.
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Post by deltav on Apr 19, 2017 19:01:17 GMT
Interstellar "hot wars", with the goal to get the other side to adopt your political philosophy is very unlikely, which is almost all our "wars" today. But interstellar "total war", with the goal to completely wipe out every man, woman and child of the other system, the way Romans fought the Carthaginians and others, is likely and probable. The weapons would be something like the space equivalent of one way doomsday icbms, with no pilots and no way to turn them back. Maybe giant slabs of rock and ice moving at near relativistic speeds heading right for their main planet, almost impossible to stop.
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Post by Enderminion on Apr 19, 2017 19:19:11 GMT
true, but deltav, sometimes you want slaves
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Post by bigbombr on Apr 19, 2017 20:16:58 GMT
true, but deltav , sometimes you want slaves If you have the tech for interstellar war, you presumably have advanced automation. If you truly want flesh-and-blood slaves instead of robots (even though it would have a lot of challenges, even disregarding slave acquisition), purpose-grown clones would be easier than interstellar slave raids.
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Post by Enderminion on Apr 19, 2017 22:05:23 GMT
might be a culture thing bigbombr, can never count on people to do whats sane
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Post by samchiu2000 on Apr 19, 2017 23:48:52 GMT
Interstellar "hot wars", with the goal to get the other side to adopt your political philosophy is very unlikely, which is almost all our "wars" today. But interstellar "total war", with the goal to completely wipe out every man, woman and child of the other system, the way Romans fought the Carthaginians and others, is likely and probable. The weapons would be something like the space equivalent of one way doomsday icbms, with no pilots and no way to turn them back. Maybe giant slabs of rock and ice moving at near relativistic speeds heading right for their main planet, almost impossible to stop. That's what I think about it deltav. After all the interstellar ship can only carry a really small payload in term of mass ratio, for example, the firefly star probe I mentioned in this thread have a deltav of .1c, total mass of 45000 ton and payload of 150 ton, and if you use it as a troop carrier to carry troop to conquer AC, your ship will need 100 year to AC, and you got only around 50 soldiers, while thousands if not millions of soldiers are waiting for you... So a war of conquer in interstellar space is nigh impossible, but if you turn your ship to a ISKM (interstellar kinetic missile), thing will getting totally different as you can use the energy of hundreds of tsar Bomba to destroy your enemies, which is great if you are the offensive side. So yes a interstellar war would only be a war of TOTAL DESTRUCTION!!! And interstellar war ITSELF Isn't actually really probable...
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Post by samchiu2000 on Apr 19, 2017 23:52:52 GMT
true, but deltav, sometimes you want slaves yea robot and clone can get the job done... And a interstellar civilization hunting for alien slaves sound really strange...
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Post by The Astronomer on Apr 20, 2017 11:43:42 GMT
might be a culture thing bigbombr , can never count on people to do whats sane Xenophobic alien civilization which send off gray goo to other star systems sounds more sensible than this, but ideology sure is dangerous.
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Post by samchiu2000 on Apr 20, 2017 11:52:31 GMT
might be a culture thing bigbombr , can never count on people to do whats sane Xenophobic alien civilization which send off gray goo to other star systems sounds more sensible than this, but ideology sure is dangerous. These little gray sent by alien i think is actually biological probe to the stars so the alien homeworld can explore the galaxy in detail~ The reason of sending these "probe" is simple, to satisfy their curiosity~ but exploration is, of course not equal to colonization. It just like that we can't colonize mars by sending robot car to there...
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Post by The Astronomer on Apr 20, 2017 12:05:01 GMT
Xenophobic alien civilization which send off gray goo to other star systems sounds more sensible than this, but ideology sure is dangerous. These little gray sent by alien i think is actually biological probe to the stars so the alien homeworld can explore the galaxy in detail~ The reason of sending these "probe" is simple, to satisfy their curiosity~ but exploration is, of course not equal to colonization. It just like that we can't colonize mars by sending robot car to there... Y...you know what a gray goo is, right...?
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Post by samchiu2000 on Apr 20, 2017 12:23:40 GMT
These little gray sent by alien i think is actually biological probe to the stars so the alien homeworld can explore the galaxy in detail~ The reason of sending these "probe" is simple, to satisfy their curiosity~ but exploration is, of course not equal to colonization. It just like that we can't colonize mars by sending robot car to there... Y...you know what a gray goo is, right...? Alright I got it wrong... REALLY REALLY WRONG...
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Post by thorneel on Apr 20, 2017 12:24:39 GMT
These little gray sent by alien i think is actually biological probe to the stars so the alien homeworld can explore the galaxy in detail~ The reason of sending these "probe" is simple, to satisfy their curiosity~ but exploration is, of course not equal to colonization. It just like that we can't colonize mars by sending robot car to there... Y...you know what a gray goo is, right...? I wouldn't assume that, not everyone here comes from the same cultural or even national background. Grey Goo is a well-known concept in our circles, but not necessarily in everyone's. Anyway, https ://en. wikipedia. org/wiki/Grey_goo
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Post by Enderminion on Apr 20, 2017 12:41:01 GMT
Only You can Prevent Grey Goo
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Post by darthroach on Apr 21, 2017 12:37:34 GMT
Y...you know what a gray goo is, right...? ...mostly fantasy. There are some hard thermodynamic limits on how quickly a gray goo can reproduce and how effective it can be at using the environment. If you want a good example of real life gray goo, look in the mirror. Life is gray goo.
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