martin fisk college of oceanic and atmospheric sciences oregon state university corvallis, oregon...
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Martin FiskCollege of Oceanic and Atmospheric SciencesOregon State UniversityCorvallis, Oregon
Astrobiology - the study of the origin, evolution,and distribution of life in the UniverseThe Ultimate Questions: How did life start?Is there life elsewhere?Are we alone?
And why is astrobiology relevant to workshopon microbial oceanography?
EARTH 2008MBARI/C-MORE/ASTEP
Microbial Oceanography WorkshopJuly 20 - 25, 2008
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Microorganisms live in extreme environmentshotcoldacidno oxygenno lighthigh saltvery drystarvation dietlive by consuming chemicals
Some marine microbial habitatshotcoldacidno oxygenno lightsaltylow food supplybut plenty of chemical food
Why Oceanography and WhyMicrobiology?
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Marine geologyVolcanoes and volcanic rocks in the oceans
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Why Oceanography
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Video footage from the movie "Pele Meets the Sea" courtesy of Richard Pyle
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Pillow Lavas
PhotoJonathan Kaye,
UW
PhotoBill Chadwick,
NOAA
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ALH84001
EETA79001
Nakhla
ShergottyImages from
NASA
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Nakhla
Nakhla
Observations in a Martian Meteorite
20 m
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Why Teachers?
Integrated science instructioninstilling wondermentphysicschemistryastronomybiologymicrobiologyoceanographygeologymathsociology
Reference: J. T. Staley (2003) Astrobiology, the transcendent science: the promise of astrobiology as an integrative approach for science and engineering education and research, Current Opinion in Biotechnology 14:347-354.
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NASA Solar System Exploration, Planets
http://solarsystem.nasa.gov/planets/index.cfm
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300,000,000,000 stars
Artist’s image of the Milky Way Galaxy
Image source unknown
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http://www.fas.org/irp/imint/docs/rst/Front/tofc.html
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http://www.fas.org/irp/imint/docs/rst/Front/tofc.html
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What do you think is the probability of life in our galaxy other than on Earth?
Probability of rolling a 6 on a die twice in a row:Equals the probability of the first number being a 6times the probability that the second number is a 6.1/6 x 1/6 = 1/36
What we need to know to answer the question.(1) The number of stars in our galaxy. (300 billion)(2) Probability that a star has planets. (guess 1/100)(3) Number of planets in the habitable zone. (guess 1/10)(4) Probability that life develops on habitable planets (guess 1/1,000,000) Number of planets with life = 300 billion x 1/100 x 1/10 x 1/1,000,000 = 300.
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www.ta3.sk/docasne/ ESTW/08_extrasolar.html
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