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The water for the Earth’s oceans and the organic molecules needed for life were probably “delivered” by comets
A Better Place to Look? • Carbonaceous chondrites are meteorites that date back to the formation <strong>of</strong> the solar system. • They fall to earth on a regular basis. • They are found to contain many complex organic molecules, including amino acids. • Comets are also remnants <strong>of</strong> the presolar nebula.
Page 1 and 2: Organic Molecules in the Interstell
Page 3 and 4: http://www.privatehand.com/flash/el
Page 5 and 6: Galaxies are the basic “unit” o
Page 7 and 8: The Milky Way is our Galaxy It cont
Page 10: Stars “cook” the elements heavi
Page 13 and 14: For Life, We Need the Atoms to Gath
Page 15 and 16: What Are Molecules? • Molecules a
Page 17 and 18: How Do We Form Molecules in This Va
Page 19: Star Formation in Molecular Clouds:
Page 22 and 23: As the gas density increases, molec
Page 24 and 25: What Molecules Are Out There? • W
Page 26 and 27: After the star “turns on” the p
Page 29 and 30: Where does life fit into the Univer
Page 31: The “Early” Earth was too hot f
Page 38: The amino acids are found in an alm

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