Life On Other Planets


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Life On Other Planets

  1. 1. By Eric B
  2. 2. <ul><li>Liquid water </li></ul><ul><li>Atmosphere </li></ul><ul><li>Certain important elements, like carbon and nitrogen, which is necessary for cells to form </li></ul><ul><li>Environment, as it can’t be constantly hit with meteorites. </li></ul>
  3. 3. <ul><li>The moon was confirmed to have water in2009 when a crater was made by a spacecraft crashing into it. </li></ul><ul><li>Unfortunately, it has no atmosphere. </li></ul>
  4. 4. <ul><li>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. </li></ul><ul><li>There are traces of water on Mars, and it has polar ice caps </li></ul>
  5. 5. <ul><li>It is an icy world, but it may have oceans underneath the ice as deep as nine times the deepest ocean on Earth. </li></ul><ul><li>The constant pull of Jupiter causes cracks in the ice on the surface. </li></ul>
  6. 6. <ul><li>N = N* fp ne fl fi fc fL </li></ul><ul><li>This is The Drake Equation, used to calculate how many intelligent life forms there could be in the milky way. </li></ul><ul><li>N = The number of communicative civilizations </li></ul><ul><li>R* = The rate of formation of suitable stars </li></ul><ul><li>f p = The fraction of those stars with planets. </li></ul><ul><li>n e = The number of Earth-like worlds per planetary system </li></ul><ul><li>f l = The fraction of those Earth-like planets where life actually develops </li></ul><ul><li>f i = The fraction of life sites where intelligence develops </li></ul><ul><li>f c = The fraction of communicative planets </li></ul><ul><li>L = The &quot;lifetime&quot; of communicating civilizations </li></ul><ul><li>This means about 10,000 other planets should have intelligent, communicating life on them </li></ul>
  7. 7. <ul><li>Astronomers have found many other planets, but many of them are gas planets or are to hot or cold. </li></ul><ul><li>The planets that are habitable are found in the “goldilocks zone” where the temperature is just right </li></ul><ul><li>One possible candidate is Gliese 581 d, which is in the habitable zone and may have water at it’s surface </li></ul><ul><li>SETI is searching for signals from intelligent life on other star systems </li></ul>
  8. 8. <ul><li>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. <>. </li></ul><ul><li>&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. < </li></ul>
  9. 9. <ul><li>Thompson, Andrea. &quot; -- It's Official: Water Found on the Moon.&quot; Learn More at 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. <>. </li></ul><ul><li>&quot;Answered Question « Ask an Astrobiologist « NASA Astrobiology.&quot; NASA Astrobiology . N.p., n.d. Web. 26 Jan. 2010. <>. </li></ul><ul><li>&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. < </li></ul><ul><li>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. </li></ul><ul><li>&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. <>. </li></ul>