Humans May be One of the Early Advanced Species in Our Unive

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PostFri Feb 03, 2012 11:02 pm » by Mozi!!a


Just Something To think About :cheers:

"Humans May be One of the Early Advanced Species in Our Universe" -- Dimitar Sasselov of Harvard-Smithsonian Center for Astrophysics


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Intelligent life may be in it's "very young" stage in the observable Universe. Its 200 billion galaxies show a clear potential to continue on as we see them today for hundreds of billions of years, if not much longer. Because planets and life are so young in our Universe, says Harvard's Dimitar Sasselov, perhaps "the human species are not late comers to the party. We may be among the early ones."

That may explain why we see no evidence of "them" and may go a long way to explaining the famous Fermi Paradox, which asks if there's advanced intelligent life in the Universe, where are they? Why haven't we discovered any evidence of their existence?

The story of the Universe according to Sasselov in is new study, The Life of Super-Earths, looks like this: generations of stars made enough iron and oxygen, silicon and carbon, and all the other elements from the original hydrogen and helium about 13 billion years ago to be able to form the Earth we live on and the planets the Kepler Mission is discovering today.

Stable environments in galaxies that were enriched enough to have planets only became available some nine billion years ago and rocky Earth-like planets and larger super-Earths, only some 7 to 8 billion years ago. And Life had to wait until that time if not later to begin its emergence throughout the Universe. Between 7 and 9 billion years ago, enough heavy elements were available for the complex chemistry needed for life to emerge were in place along with the terrestrial planets with stable environments necessary for chemical concentration.

Enrico Fermi argued that given the old age of the Universe and given the large number of stars and planetary systems and the incredibly short timescale it took humans to develop technology that other origins of life and civilizations in the Milky Way could have had a significant head start and should be significantly more advanced than we are.

Sasselov concludes that the statistical argument for Fermi's Paradox "holds true only if the timescale for the emergence of life is much shorter than the age of the universe, but not so if the two are comparable." The future for life in the Universe looks excellent, says Sasselov.

Planets may be just a tiny fraction of the Universe because of their small size, but there are so many of them that the probability of life grows exponentially. The Universe is passing through the stelliferous era --its peak of star formation--but appears to be still peaking in its formation of planets. There are more stars in the Universe than there are grains of sand on Earth and there are an equal number of planets.

There are 200 billion stars in the Milky Way and 90% are small enough and old enough to have planets in orbit. And only 10% of these stars were formed with enough heavy elements to have Earth-like planets with 2% of these --or 100 million super-Earths and Earths-- will orbit within their star's habitable zone.

Sasselov's argument in The Life of Super-Earths is compelling. One has to wonder, however, that if another planet out there in the Milky Way (and billions of galaxies beyond) is only a billion years older than Earth, how much more advanced and detectable would their technology be? As Arthur C. Clarke famously wrote, any advanced alien technology would be indistinguishable from magic.

The Daily Galaxy via The Life of the Super-Earths, Dimitar Sasselov (2012)

That may explain why we see no evidence of "them" and may go a long way to explaining the famous Fermi Paradox, which asks if there's advanced intelligent life in the Universe, where are they? Why haven't we discovered any evidence of their existence?

The story of the Universe according to Sasselov in is new study, The Life of Super-Earths, looks like this: generations of stars made enough iron and oxygen, silicon and carbon, and all the other elements from the original hydrogen and helium about 13 billion years ago to be able to form the Earth we live on and the planets the Kepler Mission is discovering today.

Stable environments in galaxies that were enriched enough to have planets only became available some nine billion years ago and rocky Earth-like planets and larger super-Earths, only some 7 to 8 billion years ago. And Life had to wait until that time if not later to begin its emergence throughout the Universe. Between 7 and 9 billion years ago, enough heavy elements were available for the complex chemistry needed for life to emerge were in place along with the terrestrial planets with stable environments necessary for chemical concentration.

Enrico Fermi argued that given the old age of the Universe and given the large number of stars and planetary systems and the incredibly short timescale it took humans to develop technology that other origins of life and civilizations in the Milky Way could have had a significant head start and should be significantly more advanced than we are.

Sasselov concludes that the statistical argument for Fermi's Paradox "holds true only if the timescale for the emergence of life is much shorter than the age of the universe, but not so if the two are comparable." The future for life in the Universe looks excellent, says Sasselov.

Planets may be just a tiny fraction of the Universe because of their small size, but there are so many of them that the probability of life grows exponentially. The Universe is passing through the stelliferous era --its peak of star formation--but appears to be still peaking in its formation of planets. There are more stars in the Universe than there are grains of sand on Earth and there are an equal number of planets.

There are 200 billion stars in the Milky Way and 90% are small enough and old enough to have planets in orbit. And only 10% of these stars were formed with enough heavy elements to have Earth-like planets with 2% of these --or 100 million super-Earths and Earths-- will orbit within their star's habitable zone.

Sasselov's argument in The Life of Super-Earths is compelling. One has to wonder, however, that if another planet out there in the Milky Way (and billions of galaxies beyond) is only a billion years older than Earth, how much more advanced and detectable would their technology be? As Arthur C. Clarke famously wrote, any advanced alien technology would be indistinguishable from magic.

The Daily Galaxy via The Life of the Super-Earths, Dimitar Sasselov (2012)


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PostFri Feb 03, 2012 11:05 pm » by Noentry


It is a possibilty, that we are one of the first.
However our solar system is about 4.5 billion years old, some are 13 billion years old.
So it is possible, but a small possibility imho

Demob fascinating post :flop:
"The third-rate mind is only happy when it is thinking with the majority.
The second-rate mind is only happy when it is thinking with the minority.
The first-rate mind is only happy when it is thinking."
A. A. Milne

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PostFri Feb 03, 2012 11:08 pm » by Mozi!!a


noentry wrote:It is a possibilty, that we are one of the first.
However our solar system is about 4.5 billion years old, some are 13 billion years old.
So it is possible, but a small possibility imho

Demob fascinating post :flop:


:flop: Thanks Homes :cheers:

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PostFri Feb 03, 2012 11:19 pm » by Naranja


Stable environments in galaxies that were enriched enough to have planets only became available some nine billion years ago and rocky Earth-like planets and larger super-Earths, only some 7 to 8 billion years ago. And Life had to wait until that time if not later to begin its emergence throughout the Universe. Between 7 and 9 billion years ago, enough heavy elements were available for the complex chemistry needed for life to emerge were in place along with the terrestrial planets with stable environments necessary for chemical concentration.

How..? how do they come up with these numbers, based on what? :headscratch:
I think its impossible to estimate how old anything is before our current knowledge "system".
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PostFri Feb 03, 2012 11:34 pm » by The57ironman


naranja wrote:How..? how do they come up with these numbers, based on what? :headscratch:
I think its impossible to estimate how old anything is .

that's what i say...

interesting though...if god created the heavens and the earth , everything has the same age..... :mrgreen:

:cheers: mobe....keep our brains stretchin'...... :pray:
..."that's one small step for man, one giant leap for mankind....Image

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