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Searching for life in the Universe

Searching for life in the Universe. Astrobiology . The study of the origin, evolution and future of life in the universe How life began Evolution of life on Earth Organisms in extreme environments. Extremophiles. Organisms that thrive in extreme conditions. Extremophiles.

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Searching for life in the Universe

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  1. Searching for life in the Universe

  2. Astrobiology • The study of the origin, evolution and future of life in the universe • How life began • Evolution of life on Earth • Organisms in extreme environments

  3. Extremophiles • Organisms that thrive in extreme conditions

  4. Extremophiles • Thermophiles: • Thrive in extreme heat • 110 to 250 °F (43 to 121 °C) • Psychrophiles: • Thrive in extreme cold 5 - 50°F (-15 to 10 °C)

  5. Extremophiles • Halophiles: • Thrive in salty environments

  6. Extremophiles • Acidophiles: • Thrive in acidic environments • Xerophiles • Thrive in dry environments

  7. Extremophiles • Radioresistant: • Resistant to UV and nuclear radiation

  8. Extremophiles • What would an extremophile be called if it could withstand high temperature and high acid concentrations? • What would an extremophile be called if it could withstand salty, dry conditions? • What would an extremophile be called if it could withstand radiation and high temperatures?

  9. Exobiology • The study of potential extraterrestrial life and the effects of extraterrestrial environments on living organisms • Is there life on other planets or moons? • How does it survive?

  10. Searching for life in the universe 1. Search for simple life forms • Bacteria, single celled-organisms

  11. Searching for life in the universe 2. Search for signs of past or future life • Amino acids

  12. Searching for life in the universe 3. Search for stars like our Sun • Star will wobble and change in brightness

  13. Searching for life in the universe 4. Search for habitable planets or moons • KEPLER TELESCOPE

  14. If there is life out there…. • How do we communicate?

  15. SETI: Search for E.T Intelligence • The Drake Equation: 1961: Francis Drake • Estimates the number of detectable extraterrestrial intelligent civilizations in the Milky Way Galaxy • http://www.pbs.org/wgbh/nova/origins/drak-flash.html

  16. Sending out a message • Binary: a numeric system that uses two numerals to represent all real numbers.

  17. 1. Arecibo Message • Radio message • Sent in 1974 • 1679 bits of information sent by radio signal • 0 = off radio signal pulse • 1 = on radio signal pulse • Arecibo Telescope: Puerto Rico • Largest radio telescope

  18. 00000010101010000000000001010000010100000001001000100010001000000001010101000000000000101000001010000000100100010001000100 1011001010101010101010100100100000000000000000000000000000000 0000011000000000000000000011010000000000000000000110100000000 0000000000101010000000000000000001111100000000000000000000000 0000000001100001110001100001100010000000000000110010000110100 0110001100001101011111011111011111011111000000000000000000000 0000010000000000000000010000000000000000000000000000100000000 0000000001111110000000000000111110000000000000000000000011000 0110000111000110001000000010000000001000011010000110001110011 0101111101111101111101111100000000000000000000000000100000011 0000000001000000000001100000000000000010000011000000000011111 1000001100000011111000000000011000000000000010000000010000000 0100000100000011000000010000000110000110000001000000000011000 1000011000000000000000110011000000000000011000100001100000000 0110000110000001000000010000001000000001000001000000011000000 0010001000000001100000000100010000000001000000010000010000000 1000000010000000100000000000011000000000110000000011000000000 1000111010110000000000010000000100000000000000100000111110000 0000000010000101110100101101100000010011100100111111101110000 1110000011011100000000010100000111011001000000101000001111110 0100000010100000110000001000001101100000000000000000000000000 0000000001110000010000000000000011101010001010101010100111000 0000001010101000000000000000010100000000000000111110000000000 0000001111111110000000000001110000000111000000000110000000000 0110000000110100000000010110000011001100000001100110000100010 1000001010001000010001001000100100010000000010001010001000000 0000001000010000100000000000010000000001000000000000001001010 00000000001111001111101001111000

  19. 1. Numbers 1-10 in binary 2. Atomic #s elements vital to life forms H, C, O, N, P 3. Formulas for DNA bases 4. Double helix shape of DNA 5. Human: height and population of Earth 6. Solar system: Human standing on Earth 7. Arecibo transmitting telescope

  20. 2. The Pioneer Plaque

  21. 3. The Golden Record

  22. 4. Cosmic Calls

  23. 5. T.V. and Radio Waves

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