Transcript EARTH 2008 MBARI/C-MORE/ASTEP Microbial Oceanography Workshop July 20 - 25, 2008 Martin Fisk College of Oceanic and Atmospheric Sciences Oregon State University Corvallis, Oregon QuickTime™ and a TIFF (LZW)

EARTH 2008
MBARI/C-MORE/ASTEP
Microbial Oceanography Workshop
July 20 - 25, 2008
Martin Fisk
College of Oceanic and Atmospheric Sciences
Oregon State University
Corvallis, Oregon
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Astrobiology - the study of the origin, evolution,
and distribution of life in the Universe
The Ultimate Questions:
How did life start?
Is there life elsewhere?
Are we alone?
And why is astrobiology relevant to workshop
on microbial oceanography?
Why Oceanography and Why
Microbiology?
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Microorganisms live in extreme environments
hot
cold
acid
no oxygen
no light
high salt
very dry
starvation diet
live by consuming chemicals
Some marine microbial habitats
hot
cold
acid
no oxygen
no light
salty
low food supply
but plenty of chemical food
Why Oceanography
Marine geology
Volcanoes and volcanic rocks in the oceans
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Video footage from the movie "Pele Meets the Sea" courtesy of Richard Pyle
Pillow Lavas
Photo
Bill Chadwick,
NOAA
Photo
Jonathan Kaye,
UW
ALH84001
EETA79001
Nakhla
Images from
NASA
Shergotty
Nakhla
Observations in a
Martian Meteorite
Nakhla
Why Teachers?
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Integrated science instruction
instilling wonderment
physics
chemistry
astronomy
biology
microbiology
oceanography
geology
math
sociology
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.
NASA Solar System Exploration, Planets
http://solarsystem.nasa.gov/planets/index.cfm
Artist’s image of the Milky Way Galaxy
300,000,000,000 stars
Image source unknown
http://www.fas.org/irp/imint/docs/rst/Front/tofc.html
http://www.fas.org/irp/imint/docs/rst/Front/tofc.html
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 6
times 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