01-13-2004, 01:03 PM | #11 |
Apophis
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Sure there's life on other planets. If universe is infinite(don't think so) then there's an infinite chance of life on other planets, ergo there are an infinite number of other races. The Drake equation, which is a principle guideline for SETI and the like uses astronomical, biological and social factors to calculate the potential number of other races in this galaxy:
N = R * f p * n e * f l * f i * f c * L And it equals 50. There have been and still are many discussions on the validity of the equation, but the point is, even mathematically speaking there is bound to be life on other planets. There is life on other planets.
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01-13-2004, 01:51 PM | #12 |
Galvatron
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If there isn't then it is an aweful waste of space [img]smile.gif[/img]
Personally I still think the jury is out on whether or not there is intelligent life here on Earth. Though the Dolphins have a strong claim to the title [img]tongue.gif[/img]
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01-13-2004, 02:14 PM | #13 | |
Fzoul Chembryl
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Quote:
It is possible that some aliens has been to Earth, but we are relatively "primitive" in their context, therefore they would not reveal themselves. Perhaps when our technology are advance enough, some of them would choose to do so.
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01-13-2004, 03:07 PM | #14 | |
Takhisis Follower
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Quote:
N = R x Fp x ne x Ft x Fi x Fc x L With a pessimistic evaluation: N is no. of intelligent civilisations in a galaxy -R is birth rate of suitable stars for life in the milky way measured in stars per year. A good average estimate is 5. Estimated by scientists as between 1 and 10. -Fp is the fraction of stars with planets. Let's say 5%. -ne is the no. of planets in a star's habitable zone - based on our solar system, only 1 as only earth for sure has water in liquid form. However, as I said before the location of other bigger planets is also important - so the average no. could be far less, say 0.1 or 0.01 (1%). - Ft is fraction of civs that have the technology and desire to communicate with other civs - can we assume 100%? Fi is the fraction of habitable planets where life does arise - a very complicated thing to guess but it took a few billion years for life to evolve on earth - the star and planet have to remain stable during this time - let's guess a low fraction e.g. 1% or 0.01. Fc is the fraction inhabited by intelligent beings - chance of being extinct = high - scientists know of at least 10 extinction level events on the earth that wiped out half the life on teh planet - let's say 0.1 (10%) L is the average no. of years a technologically advanced civilisation lasts- well technologically advanced means they've discovered radio so our civilisation has lasted over 100 years so far - how long will it last? 1000 years before we destroy ourselves? Or much longer.... let's say 1000. so we have N = 5 * 0.05 * 0.01 * 1 * 0.01 * 0.1 * 1000 = 0.0025 so even if you multiply that by 100 or increase 2 of the factors by a factor of 10, you still get less than 1 civilisation per galaxy. So maybe we ARE alone?
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01-13-2004, 03:39 PM | #15 | |
Iron Throne Cult
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I'm not saying there is diffinite life on Jupiter, considering it's entirely made of gas or Venus with it's ultimately poisonous environment, I'm just saying there can be life that can endure these conditions. In the end, no one is right or wrong, but quite frankly life could be living underneath the ground on a couple of planets in our galaxy for all we know. And like I said, I doubt there isn't life on other planets, ignorant or intelligent, otherwise the universe would be an incredible waste of space. |
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01-13-2004, 03:39 PM | #16 |
Gold Dragon
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For the love of organisms! Watch a single Star Trek episode and you KNOW that there is life out there. Sjeeeesh, that wasn't so hard, now was it? [img]graemlins/saywhat.gif[/img]
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01-13-2004, 03:55 PM | #17 | |
Iron Throne Cult
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Quote:
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01-13-2004, 04:00 PM | #18 | |
Takhisis Follower
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Quote:
I'm not saying there is diffinite life on Jupiter, considering it's entirely made of gas or Venus with it's ultimately poisonous environment, I'm just saying there can be life that can endure these conditions. In the end, no one is right or wrong, but quite frankly life could be living underneath the ground on a couple of planets in our galaxy for all we know. And like I said, I doubt there isn't life on other planets, ignorant or intelligent, otherwise the universe would be an incredible waste of space. [/QUOTE]Hmm yeah I guess that TO A DEGREE aliens could withstand different conditions but as I said earlier, everything is still made up of the same basic elements having to obey the same chemical and physical processes (even if their biology varies) thus their required living conditions can't be all that different.
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Too set in his ways to ever relate If he could set that aside, there'd be heaven to pay But weathered and aged, time swept him to grave Love conquers all? Damn, I'd say that area's gray |
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01-13-2004, 04:21 PM | #19 |
Symbol of Moradin
Join Date: June 5, 2002
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Sure there is. I am certain. It is a little weird that in zillions of miles we are the only life form... shees.
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01-13-2004, 04:25 PM | #20 |
Iron Throne Cult
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Yes, I agree with Vaskez re the Drake equation. What answer you get depends on what values you plug in. And I would almost guarantee that if you have 10 people working it out they would come up with 10 different answers - we simply don't know the values of the terms so they must be estimated.
I think there may be life, however 'intelligent' life is a different story. By 'intelligent' of course as well, you have to specify you're defining it as intelligent enough to make a radio telescope or otherwise be able to communicate across the universe, as we can (though crudely and rather weakly at this point). Basically the hypotheses I find most compelling suggest that perhaps there isn't that sort of intelligent life elsewhere - because it's simply so unlikely that the circumstances for life to evolve in exactly the right way to allow for a tool-making, science-using civilisation elsewhere. Sythe, and others who are interested in this sort of thing, I strongly recommend reading Where is everybody: 50 solutions to the Fermi paradox and the question of extra-terrestrial life by Stephen Webb. It's an excellent description and discussion of the various theories for why we haven't found or been found by extra-terrestrial civilisations [img]smile.gif[/img]
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