- #211
Andre
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- 74
FlexGunship said:Wow... I can't believe I laughed at that.
Beware of the hidden humor
FlexGunship said:Wow... I can't believe I laughed at that.
Current estimates (see below):
...(so two communicative civilizations exist in our galaxy at any given time, on average, plus two hundred more that are not trying to communicate)...
(or)
...Alternatively, making some more optimistic assumptions,... = 20,000 (there's quite a few civilizations, although the closest one would still be about 1500 light years away).
-however-
Current estimates of the parameters ...
R*... = 2.31 civilisations ( in our galaxy spanning 100,000 light years)
Ivan Seeking said:No, and we debunked this one long ago. That is the view from a US jet, not a Mig.
Andre said:Hmm maybe we should get out some numbers. Let's see about that drake equation again. Not that it can be anywhere near accurate, lacking real data, it's just guess work but:
So what are the changes of finding anything in a few hundred years conventional travelling, covering a few light years?
mugaliens said:And that has what bearing, exactly (if any) on the filmed object?
You're missing my point complete, Ivan, not to mention my post in this thread where I further debunked the claims in the YouTube video concerning ridiculous accelerations, etc.
Check fire! Check fire! You're targeting a friendly - I'm against UFOs, not for them!
nismaratwork said:Jreelawg: I see a big difference between firing a 100 year probe to a star, and sending a maneuverable craft that will enter the atmosphere of an exoplanet. Even greater is the disparity when you make it a round trip with living beings involved...
jreelawg said:Yeah, but humans have been at this space travel thing for a relatively very short time.
You could imagine after 200 years of technological advancement, or how about 100,000 years of further advancement, or even maybe 1,000,000 more years, heck why not make it a cool billion?
nismaratwork said:You can't make an argument for alien curiosity and capability by adding orders of magnitude to the time they've been around, because time and uncertainty go hand in hand. What reason does a civilization that has achieved control of their planet, defeated disease and social problems, impact events, vulcanism, etc... and colonized anything nearby want to do with distant stars? These same creatures need to be advanced, but undetectable by us, have an interest in hiding from us (but not enough to remain out of range of hillbillies, fighter pilots, and whole cities) and seem to take and offer nothing?
jreelawg said:Once we develop the fusion technology we're after, and make some more advances in autonomous systems, the technology could theoretically sustain and multiply all on it's own. These advances could make colonization very practical.
I admit, that colonization of a distant star system might be a long, long ways away. However, sending a system of autonomous probes would hardly be a stretch. What they might want could be as simple as what we expect to get out of our probes, to beam back information. Heck, at the least they would be able to intercept our broadcasting, and watch our television.
A better question than why, is why not.
nismaratwork said:Fusion is a looooooooooo... ooooo... oooooong way off. Sustaining a reaction may be within a decade or so, but developing a blanket that absorbs enough neutrons to make it worthwhile, AND produced enough tritium to keep the reaction going? Long time. Add to that the issue of materials becoming brittle from neutron bombardment, and I'd bet on us being dead before fusion. In fact, I'd bet that we could develop workable settlements on Mars first, and who would venture beyond their star system before they bothered to colonize local planets?
Using our own experience as an example, we could set the date of radio-visibility for Earth as December 12, 1901, when Guglielmo Marconi sent radio signals from Cornwall, England, to Newfoundland, Canada.[60] Visibility is now ending, or at least becoming orders of magnitude more difficult, as analog TV is being phased out. And so, if our experience is typical, a civilization remains radio-visible for approximately a hundred years.
FlexGunship said:Guys, I don't see the merit in following this line of thinking much farther. As to Jreelaws point about 1/1 solar systems supporting life, I would look at it a bit more pragmatically: 1/4 bodies in the habitible region support life, and only 4 out of hundreds are even in the habitable zone.
The argument from evidence is 1 in hundreds or thousands, not 1 in 1. Furthermore, we've only observed one closely anyway. If we were to carry your conclusion to its logical end, Jreelawg, (since we formed in 1/1 solar systems) that we mustve formed in all solar systems.
The argument is weak even from an academic point of view.
The Sun used to be fainter in the past, which is possibly the reason life on Earth has only existed for about 1 billion years on land. The increase in solar temperatures is such that already in about a billion years, the surface of the Earth will become too hot for liquid water to exist, ending all terrestrial life.[91][92]
Following the red giant phase, intense thermal pulsations will cause the Sun to throw off its outer layers, forming a planetary nebula. The only object that will remain after the outer layers are ejected is the extremely hot stellar core, which will slowly cool and fade as a white dwarf over many billions of years. This stellar evolution scenario is typical of low- to medium-mass stars.[93][94]
A Self-Reproducing Interstellar Probe
Robert A. Freitas Jr.
100 Buckingham Drive, No. 253, Santa Clara, California 95051, USA.
Journal of the British Interplanetary Society, Vol. 33, pp. 251-264 1980.
http://md1.csa.com/partners/viewrecord.php?requester=gs&collection=TRD&recid=A7618970AH&q=project+daedalus&uid=788304424&setcookie=yesProject Daedalus - The mission profile
BOND, A | MARTIN, A R
British Interplanetary Society, Journal. Vol. 29, pp. 101-112. Feb. 1976
...
The nominal mission which this vehicle is called upon to perform is a journey to about 6 light years distance, in about 49 years, at a final cruising velocity of 12.8% of the speed of light.
Chronos said:Mars is a very good candidate for conditions favorable to life in the early solar system. Venus is not.
alt said:Yikes ! I don't know what to think about this (very thread related) Reuters story;
http://www.reuters.com/article/idUS166901+15-Sep-2010+PRN20100915
nismaratwork said:If I were to float a guess, I'd say that disrupting the ability to launch nuclear weapons would be a priority for any world power, right? Well, let's put aside the "object", and think along these lines:
-Interfering with the missiles of a country other than your own in a test is could start a war.
-You CANNOT let this kind of program be anything less than black.
-People in high positions within the base are going to notice malfunctions if the system works.
Then we fork:
1.) The "disk" is actually the device which is causing the disruption, and there's no way to hide it.
2.) The "disk" is something mundane put in place to create a "chaff" story.
Now, which makes for a better story: 'Missiles malfunction, and we have no idea why!"
OR
"Flying disk seen overhead, and missiles malfunction... what do you think public?!"
The former is going to terrify EVERYONE, because the concept of malfunctioning launch systems or missiles is... well... terrifying. The latter, without telling a single story to confirm or deny any part of this, clutters the narrative. Conspiracy theorists can go in one direction, ET fanciers might consider that this is one of the few things an "alien" WOULD want to interfere with, and people like me will lean towards this being an intentional, but illegal under treaties, program.
The alternative is that this is total nonsense, people lying to cover mistakes out of fear that they'll lose their jobs... etc. I personally lean towards the notion that the disk is mundane and in place as a simple way to scramble an otherwise alarming story. If that's the case, it's really quite clever.
edit: I suppose it could be a weather phenomenon, but as I can't imagine a lenticular cloud having an effect on missile launch systems.
Bennewitz had stopped his schooling when he had nearly received a Ph.D. in physics. Instead, he focused his energies towards Thunder Scientific Corporation, a company which manufactured high-altitude testing equipment mostly for use at Kirtland Air Force Base.
For many years, Bennewitz had been interested in UFOs, and had conducted his own investigations into the subject. He became convinced that the so-called Cattle mutilations were due to aliens after he met Myrna Hansen, who was hypnotized by University of Wyoming psychologist R. Leo Sprinkle. Under hypnosis, Hansen offered a detailed account of being kidnapped by aliens and taken to an underground base in what she thought was New Mexico;.There, Hansen says, she saw many liquid-filled vats containing portions of cattle and human remains. (Bennewitz would later accuse Sprinkle of being a CIA agent, and have nothing more to do with him).
Based on this and other evidence, Bennewitz claimed to have uncovered the fact that aliens were controlling humans through electromagnetic devices, and furthermore claimed that UFOs were regularly flying near Kirtland and the nearby Manzano Nuclear Weapons Storage Facility and Coyote Canyon Test Area. He provided photos of an alleged UFO flying near Coyote Canyon at Kirtland Air Force Base.
After concluding that aliens were in fact active on earth, Bennewitz detailed his assertions to the Aerial Phenomena Research Organization, who regarded him as a deluded paranoid. He then wrote to Air Force Sergeant Richard C. Doty in October 1980 and reported his various claims. Realising that Bennewitz had, as James Mosely writes, "grossly misinterpreted" the information from some "supposedly secure communications systems," Kirtland AFB authorities sent Doty to investigate. [1]
A few days after receiving his letter, Doty and Air Force scientist Jerry Miller interviewed Bennewitz at his home. He showed them his elaborate equipment setup designed to photograph, film and otherwise monitor the supposed UFOs.
One of the curiosities of the case is that Bennewitz seems to have photographed some genuinely unexplained aerial phenomena: Clark cites an Air Force memorandum released via the Freedom of Information Act, which reports, "after analyzing the data collected by Dr. BENNEWITZ, Mr. MILLER related the evidence clearly shows some type of unidentified aerial objects were caught on film; however, no conclusion could be made whether these objects pose a threat to the Manzano/Coyote Canyon areas." (Clark 1998, 146)
Bennewitz was invited to Kirtland AFB on November 10, 1980, to present his findings to a small conference of Air Force officers and scientists. One week later, writes Clark, Air Force officials told Bennewitz they would not be investigating his evidence any further.
For most of the 1980s, Doty and/or ufologist William Moore would relate mostly spurious information to Bennewitz as part of a disinformation campaign designed to distract him from secret military projects at Kirtland. The result was that, over the years, Bennewitz grew ever more paranoid, and his health deteriorated so badly that he had a nervous breakdown.
nismaratwork said:Speak for yourself, I like sucking H2SO4 in heat that melts lead and crushing atmosphere. You enjoy your freewheeling martian lifestyle, REAL men may not be from Venus, but we go there to "toughen up".
Jreelawg: This is just a pet peeve of mine, but there is only ONE "Solar System"... ours. Our primary is called "Sol", and this is the "Solar" system. Another star with planets is another system, but not a Solar system. I know... very useless in this context, but this Hollywood faux pas thread has me feeling feisty.
Professor Fred Taylor, from Oxford University's Department of Physics, one of the Venus Express mission leaders, said:
"It is now becoming clear why the climate on Venus is so different from the Earth, when the planets themselves are otherwise quite similar.
"These differences are not just down to Venus being closer to the sun, we now know that the lack of a protective magnetic field and the differing planetary rotation rates also play a role in ensuring that many of the atmospheric processes we observe on Earth occur at a much faster rate on Venus.
"Our new data make it possible to construct a scenario in which Venus started out like the Earth - possibly including a habitable environment, billions of years ago - and then evolved to the state we see now."
jreelawg said:I got the idea from this link.
http://www.dailymail.co.uk/sciencetech/article-497417/Venus-Earths-twin-supported-life.html
Andre said:Isn't that a bit of a longshot?
For that, I think, you'd have to extend the Drake Equation with another factor limiting the range to an infinitesimal small fraction, if it wasn't meaningless in the first place.
Speaking of which, I think that the number of terrestrial planet suitable of bearing life does not deal with going though the "chaotic zone", which is likely to harass any life processes on that planet. So than number may be much smaller still.
Andre said:Pertaining the discussion about the chances of sustainability of life, I mentioned:
Other than the humor behind 'longshot', the essence of this post has not been addressed, it seems. So maybe some elaboration would help.
The chaotic zone ideas would imply that a planet would need a sizeable moon like Earth in order to stabilize its spin to avoid chaotic pertubations eventually. This would preclude relative stable climate zones, which are likely necesary to devellop higher life forms. To my knowledge, this has not been considered before in the Drake equation discussions.
This would likely reduce the current estimated chances of higher forms develloping, with a couple of orders of magnitudes.
R* = the average rate of star formation per year in our galaxy
fp = the fraction of those stars that have planets
ne = the average number of planets that can potentially support life per star that has planets
fℓ = the fraction of the above that actually go on to develop life at some point
fi = the fraction of the above that actually go on to develop intelligent life
fc = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space
L = the length of time such civilizations release detectable signals into space.[3]
[edit]
jreelawg said:Do you have a link?
The Moon has had dramatic effects on our planet and the life that inhabits it, researchers believe. The Moon stabilizes Earth's rotation, for example, preventing otherwise dramatic movements of the poles that would fuel climate swings that some scientists figure might have doomed any chance for life to form, let alone evolve.
Andre said:And again, to my knowledge, nowhere in the Drake equation discussion about estimated values is this factor addressed.
Also, the Rare Earth hypothesis, which posits that conditions for intelligent life are quite rare, has advanced a set of arguments based on the Drake equation that the number of planets or satellites that could support life is small, and quite possibly limited to Earth alone; in this case, the estimate of ne would be infinitesimal.
Large moon
The Moon is unusual because the other rocky planets in the Solar System either have no satellites (Mercury and Venus), or have tiny satellites that are probably captured asteroids
Andre said:That's exactly my point, the elaboration in the drake stuff does not address explicitely the spin axis stabilization effect of the moon. Note that the Drake equation is much older than this research to the 'chaotic zone'. So this is a new element of consideral importance and the failure to mention it, suggest that it was not included in the consideration.
Andre said:That's not the point. Unless explicitely mentioned one can safely assume that it HAS not been considered and if it had, it would have virtually elimated any chance of the existence of intelligent ET in the galaxy, whether or not you call it the Drake equation or whatever.
nismaratwork said:If I were to float a guess, I'd say that disrupting the ability to launch nuclear weapons would be a priority for any world power, right? Well, let's put aside the "object", and think along these lines:
-Interfering with the missiles of a country other than your own in a test is could start a war.
-You CANNOT let this kind of program be anything less than black.
-People in high positions within the base are going to notice malfunctions if the system works.
Then we fork:
1.) The "disk" is actually the device which is causing the disruption, and there's no way to hide it.
2.) The "disk" is something mundane put in place to create a "chaff" story.
Now, which makes for a better story: 'Missiles malfunction, and we have no idea why!"
OR
"Flying disk seen overhead, and missiles malfunction... what do you think public?!"
The former is going to terrify EVERYONE, because the concept of malfunctioning launch systems or missiles is... well... terrifying. The latter, without telling a single story to confirm or deny any part of this, clutters the narrative. Conspiracy theorists can go in one direction, ET fanciers might consider that this is one of the few things an "alien" WOULD want to interfere with, and people like me will lean towards this being an intentional, but illegal under treaties, program.
The alternative is that this is total nonsense, people lying to cover mistakes out of fear that they'll lose their jobs... etc. I personally lean towards the notion that the disk is mundane and in place as a simple way to scramble an otherwise alarming story. If that's the case, it's really quite clever.
edit: I suppose it could be a weather phenomenon, but as I can't imagine a lenticular cloud having an effect on missile launch systems.
jreelawg said:I don't understand. People do consider it, and some have come to the hypothesis that Earth may be the only planet in the galaxy capable of harboring intelligent life. It doesn't make their wild speculation right. You might as well say, that if the god factor was considered, it would virtually eliminate the chance of blah blah blah.
Whatever hypothetical you want to incorporate you can.