life on europa could this change our understanding of life? by: michael brunette sayan basu two...
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LIFE ON EUROPA
Could this change our understanding of life?
By: Michael BrunetteBy: Michael Brunette
Sayan BasuSayan Basu
Two Rivers Middle Magnet School
East Hartford, Connecticut
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Europa Facts
One of the 4 Galilean moons of JupiterOne of the 4 Galilean moons of Jupiter
Discovered by Galileo on January 7,1610Discovered by Galileo on January 7,1610
Avg. Orbital Speed = 13.740km/sAvg. Orbital Speed = 13.740km/s
Surface Temperature = 102k (-171C)Surface Temperature = 102k (-171C)
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On Europa we have…Surface of ice Surface of ice
Many cracks in the ice Many cracks in the ice
Possible salt water ocean under the ice Possible salt water ocean under the ice surfacesurface
Atmosphere of molecular oxygenAtmosphere of molecular oxygen
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Our Investigation…
Could there be life on Europa and how can Could there be life on Europa and how can we prove it? we prove it?
Idea: Send a probe to Europa to find Idea: Send a probe to Europa to find evidence of life that could be there. evidence of life that could be there.
Challenge: We need to know what Challenge: We need to know what Europa's conditions are Europa's conditions are
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A Solution?
Scan surface for crevice on the iceScan surface for crevice on the ice
Send another probe down to take ice Send another probe down to take ice samplessamples
If biological matter or chemical markers If biological matter or chemical markers are found, then we can take equipment to are found, then we can take equipment to Europa and use cryobots to explore the Europa and use cryobots to explore the oceanocean
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Problems
Ice surface is miles thickIce surface is miles thick
Deepest we have dug is 7.6 miles taking 15 Deepest we have dug is 7.6 miles taking 15 yearsyears
It will be expensive and take lots of time and It will be expensive and take lots of time and energy to take equipment to Europaenergy to take equipment to Europa
Equipment malfunctions would end the projectEquipment malfunctions would end the project
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Why Would There Be Life On Europa
Evidence suggests that…Evidence suggests that…
Liquid salt water oceanLiquid salt water ocean
Likely more salt water than on EarthLikely more salt water than on Earth
Molten core allows for a possibility of sulfur Molten core allows for a possibility of sulfur based ecosystemsbased ecosystems
Hydrothermal VentsHydrothermal Vents
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Why would there not be life on Europa?
Radiation dangerously high being 540remRadiation dangerously high being 540rem
Pressure is far less than normal pressure Pressure is far less than normal pressure on Earthon Earth
Surface Temp. Avg. 102KSurface Temp. Avg. 102K
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Tidal Flexing
Caused by the gravitational torque of Caused by the gravitational torque of Jupiter on Europa’s tidesJupiter on Europa’s tides
Energy from angular momentum and total Energy from angular momentum and total energy turn to heatenergy turn to heat
The heat will cause convection currents on The heat will cause convection currents on the surface warming the ocean the surface warming the ocean
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Hydrothermal Vents
Live near geologically active areasLive near geologically active areas
Give off minerals and chemicals such as Give off minerals and chemicals such as hydrogen sulfide that life forms require to hydrogen sulfide that life forms require to survivesurvive
Through a process known as Through a process known as chemosynthesis, methanogens can gain chemosynthesis, methanogens can gain energy to surviveenergy to survive
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Chemosynthesis
The specimen takes in carbon or methane The specimen takes in carbon or methane with other nutrients to turn into organic with other nutrients to turn into organic mattermatter
This is done by oxidizing inorganic This is done by oxidizing inorganic molecules such as hydrogen sulfide molecules such as hydrogen sulfide
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Tardigrades
Phylum: TardigradaPhylum: Tardigrada
Commonly known as “water bears”Commonly known as “water bears”
PolyextremophilesPolyextremophiles
Most are phytophagousMost are phytophagous
Found in many regions: Himalayas, hot springs, Found in many regions: Himalayas, hot springs, ice, lakesice, lakes
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Tardigrade Experiment Data
RadiationRadiation
Extreme heatExtreme heat
Extreme coldExtreme cold
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Explanation
Cryobiosis: An ametabolic stage tardigrades go Cryobiosis: An ametabolic stage tardigrades go through to withstand effects of radiation, high through to withstand effects of radiation, high and low temps., pressure and toxins.and low temps., pressure and toxins.
Tardigrades acquire it through anhydrobiosisTardigrades acquire it through anhydrobiosis
Able to survive from high levels of trehalose to Able to survive from high levels of trehalose to protect their membranes during desiccationprotect their membranes during desiccation
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Methanogens Produce energy from chemosynthesisProduce energy from chemosynthesis
Have been living in the ice of GreenlandHave been living in the ice of Greenland
Are anaerobicAre anaerobic
Can survive cold temperaturesCan survive cold temperatures
Are chemotrophsAre chemotrophs
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Extremophiles
Can live in very harsh conditionsCan live in very harsh conditions
Hyperthermophiles live near hydrothermal Hyperthermophiles live near hydrothermal systemssystems
Cryophiles live well in conditions 15 Cryophiles live well in conditions 15 degrees or lowerdegrees or lower
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Conclusions We could find evidence of life by first sending an orbiter We could find evidence of life by first sending an orbiter
and then using a probe.and then using a probe.
There is a high possibility of a liquid ocean due to tidal There is a high possibility of a liquid ocean due to tidal flexingflexing
Life on Europa would have to survive through Life on Europa would have to survive through chemosynthesischemosynthesis
Most likely life form living there are methanogensMost likely life form living there are methanogens
Tardigrades can survive in extreme conditions for an Tardigrades can survive in extreme conditions for an limited amount of timelimited amount of time
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Possible Careers
AstronautAstronaut
Astro-biologistAstro-biologist
Space Exploration ProgramsSpace Exploration Programs
BiologistBiologist
Mechanical EngineerMechanical Engineer
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Areas Of More Study
AmphipodsAmphipods
Technology used in exploration missionsTechnology used in exploration missions
Organic molecules and how they are Organic molecules and how they are formedformed
Hydrothermal vent constructionHydrothermal vent construction
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What We Have Learned
What Chemosynthesis is and how it worksWhat Chemosynthesis is and how it works
How early life forms lived on EarthHow early life forms lived on Earth
What Heterotrophs areWhat Heterotrophs are
What Methanogens, Tardigrades and Extremophiles What Methanogens, Tardigrades and Extremophiles areare
What Tidal Flexing is and how it impacts What Tidal Flexing is and how it impacts planets/moonsplanets/moons
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Resources http://www.physorg.com/news166284392.htmlhttp://www.physorg.com/news166284392.html http://en.wikipedia.org/wiki/Europa_(moonhttp://en.wikipedia.org/wiki/Europa_(moon http://www.astro.virginia.edu/class/oconnell/ast121/http://www.astro.virginia.edu/class/oconnell/ast121/
europalimages.htmleuropalimages.html http://www.wired.com/science/discoveries/multimedia/http://www.wired.com/science/discoveries/multimedia/
2008/08/gallery_kola_borehole2008/08/gallery_kola_borehole http://www.physorg.com/news203835088.htmlhttp://www.physorg.com/news203835088.html http://en.wikipedia.org/wiki/Chemosynthesishttp://en.wikipedia.org/wiki/Chemosynthesis Popular Science: Chemistry, Biology, PhysicsPopular Science: Chemistry, Biology, Physics Popular Science:Popular Science: Popular Science:Popular Science:
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Thank You!
Thank you for watching our presentation!Thank you for watching our presentation!
We would like to thank Mr.Smith, We would like to thank Mr.Smith, Mrs.Hazen, Two Rivers and NASA for Mrs.Hazen, Two Rivers and NASA for giving us this opportunity to share our giving us this opportunity to share our
thoughts!thoughts!
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