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- From: tb <tombosch@pi.net>
- Newsgroups: alt.alien.visitors,alt.paranet.ufo,alt.alien.research,sci.skeptic
- Subject: Re: Falsifying the Extra-Terrestrial Hypothesis
- Date: Sun, 07 Jul 1996 22:27:24 +0200
- Organization: Planet Internet
- Lines: 56
- Message-ID: <31E01DAC.49D7@pi.net>
- References: <318ECF14.5AAF@students.wisc.edu> <31AE5B4C.2A06@students.wisc.edu> <4qe36m$kko@elmo.cadvision.com> <31CAEB2D.E8E@fc.hp.com> <DtE3C2.Gzw@world.std.com> <4rmomv$rfp@devil.stm.it>
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-
- Leonardo Serni wrote:
- >
- > sphinx@world.std.com (SPHINX Technologies) wrote:
- >
- > >>And just how would you propose attaining such speeds, with any payload
- > >>of reasonable mass? There is no way you can avoid action/reaction, which
- > >>implies you have to push against *something* in order to move; rockets
- > >>push against their ejected reaction mass. How much reaction mass would
- > >>you need to carry, and how fast would you have to eject it, to reach 1/3
- > >>the speed of light (don't forget that the reaction mass you start off
- > >>with has to be accelerated right along with your payload)
- >
- > Well, actually is theoretically possibile to approach to the speed of
- > light. You would need to eject particles at relativistic speeds, which
- > would give them an additional mass. This way, you're simply converting
- > part of your fuel into energy, and that energy into kinetic energy for
- > the particles; the kinetic energy becomes mass according to relativity
- > theory. This way you reach, say, 0.9 c. Then the relativistic effects
- > become relevant; your starship's mass increases, according to the same
- > relativity theory. With a great effort and some means of collecting
- > more fuel on the way, for example interstellar hydrogen (about one
- > atom per cubic meter, was it?), you reach 0.99... c. At that point,
- > you can proceed inertially; ship time is slowed down.
- >
- > But even so, there's great danger - a speck of dust in your path would
- > punch a hole right through the ship. And interstellar travel still
- > requires centuries of realtime, and years of shiptime. If I wanted to
- > colonize a galaxy, I'd build an incubator ship -- totally automatic,
- > capable of self-repairing, of rebuilding a human being from scratch
- > using basic elements, and of mining asteroids and comets to replicate
- > itself. All I'd have to store on the ship would be some tons of
- > CHON/R, the machineries, and the programs. Then the ship could go slow
- > as it could. And in some **billion** years...
- >
- > Leonardo revisiting Von Neumann's theory and Fermi's paradox
- >
-
-
-
- If I may intrude your little conversation ...
-
- your talking about the speed of light?
- what light?
- white ...blue...red....
- for chist sake your talking about frequenties!
-
- light is something visible to US it's NO limit for watsoever!
-
- The frequenties DON'T stop just because we can't see it anymore.
-
- Einstein was wrong! But he did the best he could do... THEN.
-
- NOW is NOW...
-
- tom
-
-