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Life On Other Planets



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  • 1. By Eric B
  • 2.
    • Liquid water
    • Atmosphere
    • Certain important elements, like carbon and nitrogen, which is necessary for cells to form
    • Environment, as it can’t be constantly hit with meteorites.
  • 3.
    • The moon was confirmed to have water in2009 when a crater was made by a spacecraft crashing into it.
    • Unfortunately, it has no atmosphere.
  • 4.
    • It was thought to have an atmosphere once upon a time, but when it’s core cooled and stopped, causing the magnetic field to go away, letting the Sun’s solar winds to tear it’s atmosphere away.
    • There are traces of water on Mars, and it has polar ice caps
  • 5.
    • It is an icy world, but it may have oceans underneath the ice as deep as nine times the deepest ocean on Earth.
    • The constant pull of Jupiter causes cracks in the ice on the surface.
  • 6.
    • N = N* fp ne fl fi fc fL
    • This is The Drake Equation, used to calculate how many intelligent life forms there could be in the milky way.
    • N = The number of communicative civilizations
    • R* = The rate of formation of suitable stars
    • f p = The fraction of those stars with planets.
    • n e = The number of Earth-like worlds per planetary system
    • f l = The fraction of those Earth-like planets where life actually develops
    • f i = The fraction of life sites where intelligence develops
    • f c = The fraction of communicative planets
    • L = The "lifetime" of communicating civilizations
    • This means about 10,000 other planets should have intelligent, communicating life on them
  • 7.
    • Astronomers have found many other planets, but many of them are gas planets or are to hot or cold.
    • The planets that are habitable are found in the “goldilocks zone” where the temperature is just right
    • One possible candidate is Gliese 581 d, which is in the habitable zone and may have water at it’s surface
    • SETI is searching for signals from intelligent life on other star systems
  • 8.
    • Cowen, Robert C.. &quot; Student Research Center - powered by EBSCOhost: Is anyone else out there?.&quot; EBSCOhost . N.p., n.d. Web. 26 Jan. 2010. <http://web.ebscohost.com/src/detail?vid=7&hid=106&sid=492127c8-493a-4675-b222-ba5d0e665d4f%40sessionmgr114&bdata=JnNpdGU9c3JjLWxpdmU%3d#db=ulh&AN=998128>.
    • &quot; Student Research Center - powered by EBSCOhost: Astronomers on brink of finding planet like Earth.&quot; EBSCOhost . N.p., n.d. Web. 1 Feb. 2010. <http://web.ebscohost.com/src/detail?vid=8&hid=105&sid=95c8f783-0ac5-48a0-8c4a-766bdd5995b0%40sessionmgr114&bdata=JnNpdGU9c3JjLWxpdmU%3d#db=n5h&AN=HOB172221965510
  • 9.
    • Thompson, Andrea. &quot;SPACE.com -- It's Official: Water Found on the Moon.&quot; Learn More at Space.com. From Satellites to Stars, NASA information, Astronomy, the Sun and the Planets, we have your information here. . N.p., n.d. Web. 26 Jan. 2010. <http://www.space.com/scienceastronomy/090923-moon-water-discovery.html>.
    • &quot;Answered Question « Ask an Astrobiologist « NASA Astrobiology.&quot; NASA Astrobiology . N.p., n.d. Web. 26 Jan. 2010. <http://astrobiology.nasa.gov/ask-an-astrobiologist/question/?id=53>.
    • &quot;Is There Life On Jupiter's Moon Europa? Finding Signs Of Current Geological Activity On A Frozen World.&quot;  Science Daily: News & Articles in Science, Health, Environment & Technology . N.p., n.d. Web. 30 Jan. 2010. <http://www.sciencedaily.com/releases/2008/08/080806210116.htm
    • Ford, Steve, and WB8IMY. &quot;What Is The Drake Equation? .&quot; The SETI League: Searching for Extra-Terrestrial Intelligence . N.p., n.d. Web. 1 Feb. 2010. http://www.setileague.org/general/drake.htm
    • &quot;Most Earthlike Planet Yet Found May Have Liquid Oceans.&quot; Daily Nature and Science News and Headlines | National Geographic News . N.p., n.d. Web. 1 Feb. 2010. <http://news.nationalgeographic.com/news/2009/04/090421-most-earthlike-planet.html>.