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Reaching for Interstellar Flight
space.com ^ | 12/17/03 | Leonard David

Posted on 12/18/2003 8:37:33 AM PST by KevinDavis

When Star Trek's U.S.S. Enterprise hit the television screen in 1966, the science fiction series had trouble finding its own space and time slot.

Decades later, a similar visionary zeal to seek new worlds and new civilizations is a factual enterprise for a new generation of galactic explorers. They are taking on spacetime and hoping to boldly go where no spacecraft has gone before -- out to far-flung stars and the planets that circle them.

(Excerpt) Read more at space.com ...


TOPICS: Government; Miscellaneous; News/Current Events
KEYWORDS: crevolist; nasa; space; spaceexploration
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To: Aeronaut
parallel world" where nothing goes slower than the speed of light.

Nothing goes slower that the speed of light in this universe--from some viewpoint or another.

41 posted on 12/18/2003 5:01:27 PM PST by donh
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To: RussianConservative
In 1920's Physicists say that nuclear power is fantasy

Maybe. Huxley published Brave New World in '32, written in '31. He said in '61 he should have included nuclear power since everyone was talking about it. No surprise.

42 posted on 12/18/2003 5:06:22 PM PST by RightWhale (Close your tag lines)
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To: staytrue
No one has ever observed a macro sized object exceed the speed of light in nature.

One could much broader (and more precise) and say that we've never seen information (in the abstract sense, which covers everything) exceed the speed of light. Ever. Which is what the rule really says.

The speed of light is an extremely tough problem. One that has the potential to be uncrackable because it is far more fundamental than most people realize (particularly when properly re-phrased as the "speed of information"). Saying that there is a way around everything in nature is almost as naive as saying there is no way to emulate everything found in nature.

43 posted on 12/18/2003 5:08:06 PM PST by tortoise (All these moments lost in time, like tears in the rain.)
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To: Shryke
Gravity drive propulsion...
Theorists at big places have been talking it for a while.

Gravity waves are projected (in theory) and accelorated towards by the vehicle... the gravity wave is constanty moved forward ahead of the vehicle, projected by that vehicle... and constant acceloration continues at one g, say 35 feet per second per second... at the point where near light speed is attained, a "controlled" black hole is the result, and the light, matter and energy of the object move into an induced "fold" in space time fabric.

knowing how to fold gravity and such... is very likely where we will be able to do it. normal propulsion won't work. or it's derivatives.
we observed birds and learned to fly.
we observe LIGHT being too slow to escape from gravity wells... and learn how to exert and expend and invest forces that are more powerful than that of light...

If gravity wells can suck in light waves, packets or energy that are already travelling lightspeed, they could theoretically be used, projected and calculated to do accelorate and direct other matter, even that which is going near light speed.

It functions much like the horse with a stick attached to it's back and a suspended carrot on a string, JUST beyond the horses grasp.
44 posted on 12/18/2003 5:25:01 PM PST by recalcitrant
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To: RussianConservative
"Or maybe, life evolve not so rapidly or intelligent life equally rare and so not many if any civilizations have faster then light, we may be one of first venturing thus maybe that is reason none are here. To say this impossible because we see no one else doing so is straw man arguments."

No. As Sagan taught us, we are the last and dumbest. If intelligent life is common, all the extant civilizations are thousands--or millions--of years ahead of us. We only developed radio in the last century or so. We're the primitives. Sol is a third-generation star; there has been ample time for highly-sophisticated civilizations to evolve and spread. Imagine our technology level if we reach 1000 or 10,000 years longevity as a technical civilization. Societies like that are everywhere IF intelligent life is common. We see no trace; ergo they are not there or interstellar travel is impossible even for civilizations with god-like technology.

--Boris

45 posted on 12/18/2003 6:15:08 PM PST by boris (The deadliest Weapon of Mass Destruction in History is a Leftist With a Word Processor)
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To: Momaw Nadon
"Could you elaborate on this point?"

Sure.

Suppose there are thousands of super-advanced civilizations. One of them says "stay away from Earth". 99.9% of the others agree. 0.1% say "Go tentacle yourself" and land on the White House lawn.

If there is a "Federation" that for some reason has put us off limits, what is the possibility that all super-technological civilizations belong...or agree to its dictums? Look at Earth. Does everybody obey the U.N.?

WHY would such a ban be imposed? Do aliens obey the Prime Directive? Why? Do all alien civilizations concur?...

Such arguments ("We're in a game preserve") involve projecting HUMAN thought modes, ethics, morals, and so forth into every single possible intelligent alien life form. It is "argument from Twilight Zone Episode 62."

Etc.

--Boris

46 posted on 12/18/2003 6:22:26 PM PST by boris (The deadliest Weapon of Mass Destruction in History is a Leftist With a Word Processor)
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To: recalcitrant
"Gravity drive propulsion...
Theorists at big places have been talking it for a while.

Gravity waves are projected (in theory) and accelorated towards by [sic] the vehicle... the gravity wave is constanty moved forward ahead of the vehicle, projected by that vehicle... and constant acceloration continues at one g, say 35 feet per second per second [one g is 32.174 ft/s/s or 1.032 light years per year2]... at the point where near light speed is attained, a "controlled" black hole is the result, and the light, matter and energy of the object move into an induced "fold" in space time fabric.

knowing how to fold gravity and such... is very likely where we will be able to do it. normal propulsion won't work. or it's derivatives.

we observed birds and learned to fly.

we observe LIGHT being too slow to escape from gravity wells... and learn how to exert and expend and invest forces that are more powerful than that of light...

If gravity wells can suck in light waves, packets or energy that are already travelling lightspeed, they could theoretically be used, projected and calculated to do accelorate and direct other matter, even that which is going near light speed.

It functions much like the horse with a stick attached to it's back and a suspended carrot on a string, JUST beyond the horses grasp."

Bafflegab. As Wolfgang Pauli would say, "It's not even wrong."

I take it you have not had much college, especially physics. Your post demonstrates a stunning misunderstanding of relativity, both special and general.

Put it in numbers. Equations. Not just blather about "folding gravity".

--Boris

47 posted on 12/18/2003 6:29:33 PM PST by boris (The deadliest Weapon of Mass Destruction in History is a Leftist With a Word Processor)
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To: boris
Imagine our technology level if we reach 1000 or 10,000 years longevity as a technical civilization. Societies like that are everywhere IF intelligent life is common. We see no trace; ergo they are not there or interstellar travel is impossible even for civilizations with god-like technology.

Maybe we just haven't figured out what to look for yet.

48 posted on 12/18/2003 6:32:49 PM PST by Momaw Nadon (Goals for 2004: Re-elect President Bush, over 60 Republicans in the Senate, and a Republican House.)
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To: boris
Has it occurred to you that proving a point with negative evidence is poor logic?

I'm not saying you're wrong. You might be right. I don't have sufficient data to tell. But I find your logic less than compelling, since it depends entirely on us primitives having interpreted all the (lack of) evidence correctly.

49 posted on 12/18/2003 8:34:29 PM PST by irv
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To: tortoise
I'm not totally sure, but I think certain short term quantum fluctuations are allowed to be faster than the speed of light if the fluctuation is within the bounds of the uncertainty principle which requires these fluctuations to be extremely small and of very short duration.

Quantum fluctuations also allow for violation of conservation of mass and energy on a very small and short term basis also, I think.
50 posted on 12/18/2003 9:43:21 PM PST by staytrue
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To: boris
As Sagan taught us ...

I think Sagan was an arrogant condescending, liberal, PBS lover, who did not do very good physics either. This is the guy who came up with nuclear winter. This is the guy who said since there are billions and billions of galaxies, there must be billions and billions of civilizations. I think he was on the global warming band wagon too.

51 posted on 12/18/2003 9:49:35 PM PST by staytrue
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To: staytrue
Quantum fluctuations also allow for violation of conservation of mass and energy on a very small and short term basis also, I think.

Energy does not have to be conserved over (typically very short) finite time intervals. This is correct.

However, there is still no way for information to be transmitted faster than the speed of light. All known "faster than light" phenomenon are not capable of carrying information faster than light, and therefore do not violate this basic rule.

By analogy, the frequency with which a CPU can retire machine code instructions does not put a limit on how fast the transistors that make up the CPU can switch. Quite the opposite in fact, even if the transistors are capable of switching at much faster speeds than the nominal processor speed.

52 posted on 12/18/2003 10:47:29 PM PST by tortoise (All these moments lost in time, like tears in the rain.)
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To: boris
PH.D.

fwiw...
take a hike.
53 posted on 12/19/2003 12:23:21 AM PST by recalcitrant
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To: boris
We do not observe them or their traffic. Ergo, either there are no ultra-sophisticated ETs or none of these schemes are feasible.

Ah, once again a blind man proves there is no such thing as light. I find most of your posts quite clever, but I am sad to say that this is one of the most simple-minded things I have ever read.

54 posted on 12/19/2003 1:00:47 AM PST by thedugal (Someone ping me when the shootin' starts...)
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To: boris
Sol is a third-generation star; there has been ample time for highly-sophisticated civilizations to evolve and spread.

But the first generation solar systems didn't have heavy elements, so there were no Earth-like planets in them. The second generation would still have had proportionately fewer heavy elements. We may be part of the first crop of experiments in Earth-like conditions.

55 posted on 12/19/2003 6:12:46 AM PST by VadeRetro
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To: recalcitrant
"PH.D."<

I assume it's in a discipline like Dr. Jerry Pournelle's, who flaunts his PhD in history as credential to bloviate on all manner of technical disciplines. Third-tier school?

--Boris

56 posted on 12/19/2003 7:09:24 AM PST by boris (The deadliest Weapon of Mass Destruction in History is a Leftist With a Word Processor)
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To: VadeRetro
"But the first generation solar systems didn't have heavy elements, so there were no Earth-like planets in them. The second generation would still have had proportionately fewer heavy elements. We may be part of the first crop of experiments in Earth-like conditions."

The second generation should still have generated lots of intelligent ET civilizations if life is common and intelligence a common end-point of evolution. Remember the 'billions and billions' argument.

Furthermore, even supposing that only 3rd-generation stars can bring forth intelligence, there is no reason to suppose that genesis and evolution proceed at the same rate everywhere.

For example, even though life on Earth is over 3 billion years old, for most of that time it was microbes. In fact, if the "snowball Earth" hypothesis proves true, then WE have descended from only 600 million years of interrupted evolution, not 3 billion years. (Snowball earth killed off something like 99.96% of all organisms extant prior to the climate catastrophe).

--Boris

57 posted on 12/19/2003 7:14:04 AM PST by boris (The deadliest Weapon of Mass Destruction in History is a Leftist With a Word Processor)
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To: KevinDavis
I'mm rather partial to the Defiant. More compact. Sturdier construction. Nice little chariot.


58 posted on 12/19/2003 7:14:17 AM PST by Bloody Sam Roberts (I have opinions of my own - strong opinions - but I don't always agree with them.)
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To: staytrue
"I think Sagan was an arrogant condescending, liberal, PBS lover, who did not do very good physics either. This is the guy who came up with nuclear winter. This is the guy who said since there are billions and billions of galaxies, there must be billions and billions of civilizations. I think he was on the global warming band wagon too."

Yeah, but even a stopped clock is right twice a day. Occasionally he got something right. He was right--IMHO--about us being the latest, most recent, new kids on the block.

I've never seen or heard anyone disprove the contention, or offer even a plausible reason it might be wrong.

--Boris

59 posted on 12/19/2003 7:17:01 AM PST by boris (The deadliest Weapon of Mass Destruction in History is a Leftist With a Word Processor)
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To: js1138
Rare Earth
60 posted on 12/19/2003 7:28:14 AM PST by Dr.Deth
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