do we live on a "privileged planet"? (by intelligent faith 315.com)
DESCRIPTION
How Privileged are we to live on planet earth? Are we just here by accident? Check out this presentation that we used in one of our apologetics classes called Reason to Believe. Check out the audio on itunes under Reason to Believe.TRANSCRIPT
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Privileged Planet
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Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in wich there are far more galaxies than people – Carl Sagan
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The universe is populated by innumerable earths and perhaps innumerable forms of life – Robert Jastrow
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I am against religion because it teaches us to be satisfied with not understanding the world – Richard Dawkins
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How many starts?
Milky Way – 300 Billion
300 000 000 000
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Universe – up to 1 Septillion
1 000 000 000 000 000 000 000 000
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So why are we so special?
20 Factors to have our planet
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So why are we so special?
20 Factors to have our planet
1 000 000 000 000 000 (quadrillion)
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So why are we so special?
Within Galactic Habitable zone
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
Nearly circular orbit
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
Nearly circular orbit
Oxygen-rich atmosphere
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
Nearly circular orbit
Oxygen-rich atmosphere
Correct mass
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
Nearly circular orbit
Oxygen-rich atmosphere
Correct mass
Orbited by large moon
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
Nearly circular orbit
Oxygen-rich atmosphere
Correct mass
Orbited by large moon
Magnetic field
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So why are we so special?
Within Galactic Habitable zone
Orbiting Main Sequince G2 Dwarf Star
Protected by Gas giant planets
Within circular stellar habitable zone
Nearly circular orbit
Oxygen-rich atmosphere
Correct mass
Orbited by large moon
Magnetic field
Plate tectonics
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Terrestrial Planet
Thick tectonic plates
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Terrestrial Planet
Thick tectonic plates
4 – 30 miles thick
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Terrestrial Planet
Thick tectonic plates
4 – 30 miles thick
Regulates interior temp cycles, carbon dioxide
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Terrestrial Planet
Thick tectonic plates
4 – 30 miles thick
Regulates interior temp cycles, carbon dioxideMovement of liquid iron creates magnetic field
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Oxygen/Nitrogen Atmosphere
Needed for complex life
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Oxygen/Nitrogen Atmosphere
Needed for complex life
Temperate climate, correct gasses for liquid water
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Large Moon
Earth has big moon, ¼ size
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Large Moon
Earth has big moon, ¼ size
Gravitational pull keeps earth on axis
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Large Moon
Earth has big moon, ¼ size
Gravitational pull keeps earth on axis
Temperate season changes
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Type of Star
Complex life needs to around a star
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Type of Star
Complex life needs to around a star
If sun was smaller like 90% of stars in galaxy
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Type of Star
Complex life needs to around a star
If sun was smaller like 90% of stars in galaxy
Locked into permanent orbit facing sun
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Degree of Fine Tuning
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strong nuclear force constant
if larger: no hydrogen would form; atomic nuclei for most life-essential elements would be unstable; thus, no life chemistryif smaller: no elements heavier than hydrogen would form: again, no life chemistry
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weak nuclear force constant
if larger: too much hydrogen would convert to helium in big bang; hence, stars would convert too much matter into heavy elements making life chemistry impossibleif smaller: too little helium would be produced from big bang; hence, stars would convert too little matter into heavy elements making life chemistry impossible
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gravitational force constant
if larger: stars would be too hot and would burn too rapidly and too unevenly for life chemistryif smaller: stars would be too cool to ignite nuclear fusion; thus, many of the elements needed for life chemistry would never form
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electromagnetic force constant if greater: chemical
bonding would be disrupted; elements more massive than boron would be unstable to fissionif lesser: chemical bonding would be insufficient for life chemistry
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ratio of electromagnetic force constant to gravitational force
constant if larger: all stars would be at least 40% more massive than the sun; hence, stellar burning would be too brief and too uneven for life supportif smaller: all stars would be at least 20% less massive than the sun, thus incapable of producing heavy elements
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ratio of electron to proton mass
if larger: chemical bonding would be insufficient for life chemistryif smaller: same as above
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ratio of number of protons to number of electrons
if larger: electromagnetism would dominate gravity, preventing galaxy, star, and planet formationif smaller: same as above
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expansion rate of the universe
if larger: no galaxies would formif smaller: universe would collapse, even before stars formed
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entropy level of the universe
if larger: stars would not form within proto-galaxiesif smaller: no proto-galaxies would form
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mass density of the universe
if larger: overabundance of deuterium from big bang would cause stars to burn rapidly, too rapidly for life to formif smaller: insufficient helium from big bang would result in a shortage of heavy elements
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velocity of light
if faster: stars would be too luminous for life support if slower: stars would be insufficiently luminous for life support
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average distance between galaxiesif larger: star formation late
enough in the history of the universe would be hampered by lack of materialif smaller: gravitational tug-of-wars would destabilize the sun's orbit
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density of galaxy cluster
if denser: galaxy collisions and mergers would disrupt the sun's orbitif less dense: star formation late enough in the history of the universe would be hampered by lack of material
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decay rate of protons
if greater: life would be exterminated by the release of radiationif smaller: universe would contain insufficient matter for life
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decay rate of protons
if greater: life would be exterminated by the release of radiationif smaller: universe would contain insufficient matter for life
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e
Why not God?