Astronomer Guillermo Gonzalez on habitable planets: “Our universe is a small target indeed.”
| October 31, 2011 | Posted by News under Extraterrestrial life, News |
Astrobiology research is revealing the high specificity and interdependence of the local parameters required for a habitable environment. These two features of the universe make it unlikely that environments significantly different from ours will be as habitable. At the same time, physicists and cosmologists have discovered that a change in a global parameter can have multiple local effects. Therefore, the high specificity and interdependence of local tuning and the multiple effects of global tuning together make it unlikely that our tiny island of habitability is part of an archipelago. Our universe is a small target indeed.
- P. 625, The Nature of Nature
Perhaps, the less we know, the easier it is to imagine “THEY are out there” – without the undue burden of details.
17 Responses to Astronomer Guillermo Gonzalez on habitable planets: “Our universe is a small target indeed.”
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further notes:
Inspirational video and verse:
Under a design scenario I ewould think tat ETs would be a given…
A bit of little known trivia to go along with the irreducible complexity revealed, in ‘the high specificity and interdependence of the local parameters required for a habitable environment’, by Dr. Gonzalez, is the little known fact that the finely tuned universal constants are also found to be irreducibly complex;
Joseph not sure about that, according to Hugh Ross the conditions needed for life are very rare indeed.
Rare if you consider a non-designed universe- and even then say 1,000,000 such civilizations existed. Given the vast number of stars they would be rare.
I guess you guys missed the latest study of data from NASA’s Kepler planet-finding observatory that showns the number of sun-like stars with planets in a habitable ‘Goldilocks zone’ may number as many as 15 billion in our galaxy alone:
New study: 1/3 of Sun-like stars might have terrestrial planets in their habitable zones
There is some dispute over the calculations however, and the actual number may be closer to 10-12 billion. The study itself
Terrestrial, Habitable-Zone Exoplanet Frequency from Kepler
That goes along with the data that we actually have discovered at least 53 other exoplanetary systems and several hundred exoplanets.
We sure must be the privileged planet all right!
It takes much more than having the right star and being in the right zone. There are some twenty factors that must be met in order to get complex metazoans.
I bet you didn’t even read “The Privileged Planet”
Summary (not exhaustive):
Within the Galactic Habitable Zone
Within the Circumstellar Habitable Zone
Liquid water
Orbit a Spectral type G2 dwarf main sequence star
Protected by gas giants
Nearly circular orbit-
Oxygen rich
Correct mass
Large moon to stabilize the angle of rotation
Moderate rate of rotation
Terrestrial planet
Ratio of water to continents
Plate tectonic re-cycling
Magnetic field
further notes:
As well, It is found that not only must the right chemicals be present on earth to have life, the chemicals must also be present on the earth in ‘specific abundances’.
Indeed, Just counting possible planets that might be habitable, and leaving it at that, is way too simplistic, not to mention VERY unscientific!
Music and verse:
If one is YEC its impossible to believe in alien life. If iD or evolutionist its possible I guess.
Just the odds. ID seeing the odds as terrible for evolution here much less out there.
iI say the universe is empty and was made for a eternal living human civilization to colonize and have dominion over it.
Being eternal would make a great population here and elbrow room would of been needed.
So it would make sense we need all that room.
Its just undeveloped property.
Something went very wrong.
Don’t leave off: not destabilised by interacting and wandering gas giants — a biggie.
Thanks- I was going to go through the book again and post all of the factors.
Why would a YEC be against alien life? Certainly YEC, meaning young *this* earth, doesn’t contradict the idea of aliens on *a different* earth.
Further, I can’t see any reason why even a Biblical literalist would object to the idea of life, even intelligent life, elsewhere. Sheesh, angels, visions, visitations of those who have passed from this life to another realm . . . these are all standard fare in the Bible. Why on earth (pun intended) would a Biblical literalist think that life only exists on this earth?
First because Adams sin/rebellion was the origin for death on earth and in the universe. The universe is full of smashed things and one could die out there.
Its impossible for life living on another planet to be living in the original state of eternity. As if we could walk over to them and touch them.
then the bible says Gods spirit was the origin for life and it covered the earth in the beginning.
life out there would need that help too.
Then clearly man is the point for creation and not intelligent life elsewhere.
YEC always rejects alien life based on the fall issue.
I like the science fiction if its great but reality is here.
The universe was just for eternal mans use.
Why should this be so surprising to people?
I’m serious. Life is incredible, in fact, a miracle. Walking on water? Meh. But life?? Can you make life in a laboratory? Nope. And as Richard Feynman said, “What I cannot create, I do not understand.” Life is a miracle. QED.
By rights even we shouldn’t exist. So why should it be so surprising that life probably doesn’t exist elsewhere either?
Might it be something to do with 100 years of sci-fi pop culture filling all our heads with the idea that life can just turn up on any old planet? Gene Roddenberry, methinks you have a lot to answer for my friend.