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Where is this?

Explore the latest research on exoplanets and the search for intelligent life beyond Earth. Learn about the Drake Equation, SETI Surveys, and Project Phoenix. Discover the potential habitats for life and the methods used to detect exoplanets. Join us for an exciting lecture series. Reviews and papers due by 5pm.

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Where is this?

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  1. Where is this?

  2. lecture 23 lecture 24 VOTE! Level 3 Present Present Turkey Time Turkey Time Reviews Due 5pm Papers Due 5pm

  3. Talk Schedule • TUESDAY, 13 NOV --- 10 AM • 1. Rachael • 2. Justin • 3. Ryan • 4. Ilija • 5. Deborah • THURSDAY, 15 NOV --- 10 AM • 6. Hodari • 7. Azmain • 8. Katie • 9. Katherine • 10. Andrew

  4. Life Beyond Earth photo: Emory Kristof

  5. The Drake Equation N = R*fp nefl fi fc L N # civilizations with detectable electromagnetic emissions R*rate of star formation (stars/year) suitable for intelligent life fpfraction of stars with planetary systems ne# of worlds/system with environment suitable for life flfraction of planets on which life appears fi fraction of life-bearing planets on which intelligent life emerges fcfraction of civilizations revealing existence L length of time civilizations release detectable signals (years)

  6. Exoplanets NOV 2018 Jup Nep Ear

  7. Exoplanets NOV 2018 Jup transit radvel Nep Ear

  8. Kepler Results (all stellar types, Fressin+ 2013) what about longer orbital P? occurrence not strong dependence on host star type

  9. Transiting Exoplanet Survey Satellite TESS

  10. The Scorecard • as of 07 November 2018 • Indirect Methods • 1. (pulsar) timing 23 systems 29 planets • 2. radial velocities 577 systems 775 planets • 3. astrometry 2 systems 4 planets • 4. transits 2145 systems 2864 planets • Direct Methods • 5. imaging 84 systems 102 “planets” • exoplanets.org exoplanet.eu

  11. Life Beyond Earth photo: Emory Kristof

  12. SETI Water Hole

  13. SETI Surveys

  14. Project Phoenix began as NASA’s High Resolution Microwave Survey (HRMS) Targeted Search (Ames) and Sky Survey (JPL) first observations, October 12, 1992 cancelled by Congress in 1993 renamed Project Phoenix private funding sources sought private funding sources found Arecibo 305m (largest in N) Jodrell Bank (England) Greenbank 43m Parkes 64m (largest in S)

  15. Project Phoenix Detects ET! time frequency test case: Pioneer 10 beyond 70 AU signal allowed to drift in frequency from Earth motion separates terrestrial from extraterrestrial signals

  16. Allen Array dedicated SETI effort SETI Institute and UC Berkeley Hat Creek Observatory, Mt. Lassen, California 350 antennas of 6.1m diameter = 100m radio telescope 42 in operation $30M from Paul Allen (co-founder of Microsoft)

  17. Allen Array Gregorian design 350 X 6.1m dishes

  18. Allen Array Project Phoenix got 3 weeks/year at Arecibo Allen Array will increase efficiency by 100X full time SETI operation daytime observations ok (Arecibo has Sun problem) different stars (Arecibo limited to near-ecliptic sources) multiple dishes … ~20 stars searched simultaneously expansion easy … target list grows from 1,000 stars to 1,000,000 stars

  19. Nearby Stars Project Phoenix 50 pc Allen Telescope Array 300 pc

  20. G 362 parsecs 1180 light years F-K 240 parsecs 782 light years A-M (now) 147 parsecs 479 light years A-M (pred) 126 parsecs 411 light years The Dream … 1000 Light Year Catalog (307 pc) How Far for 1 Million Stars?

  21. 10 Parsec Census 2018.3 wd 20 5 % O,B 0 0 % A 4 1 % F 7 2 % G 19 5 % K 44 12 % M 283 75 % bd 50 pl 34+8

  22. Three Laws of M Dwarfs • M dwarfs dominate the stellar population. • M dwarfs dominate the stellar mass budget. • M dwarfs are more varied than any other spectral type.

  23. Solar Family How are they different?

  24. The Seven Dwarfs

  25. Nice Earth

  26. Voyager’s Farewell

  27. The Brothers Henry

  28. Solar System Explorers Triple Name your 3 favorite things that you learned in ASTR 8850 this year. 1. difficult to tell life from non-life 2. Uranus and Neptune have lopsided mag fields 3. Jupiter’s mag tail is largest structure in SS 4. Jupiter’s core is about 20000K 5. Enceladus has its “own ring” the E ring 6. stellar classification defined by H line strength 7. we landed on Titan … well, Huygens did 8. Moon has a tenuous atm 9. life on Earth would survive longer if Earth booted from SS 10. 51 Peg is not the first planet discovered 11. … 12. … 13. … 14. … 15. … 16. … 17. … 18. … 19. … 20. …

  29. Solar System Explorers Triple Name your 3 favorite things that you learned in ASTR 8850 this year. 1. many storms on Jupiter, not just one … check out those poles AND Saturn 2. methane has Titan rain … and standing liquid on the surface 3. Earth is on atm #4 … primordial, volcano, life, people 4. amino acids have been found inside a meteorite 5. I Eat Green Cats 6. computers exist and keep track of NEOs 7. many types of H2O ice … at least 16! 8. we are not sure how big the Oort Cloud is 9. jet streams at Saturn’s pole form a hexagon 10. life has been found on the inside walls of nuclear reactors 11. … 12. … 13. … 14. … 15. … 16. … 17. … 18. … 19. … 20. …

  30. Solar System Explorers Triple Name your 3 favorite things that you learned in ASTR 8850 this year. 1. Mimas looks like the Death Star … and thermal signature looks like Pacman 2. Pluto has a heart-shaped feature on its surface 3. Venus’ higher regions have higher surface gravity (if Todd didn’t totally screw that up) 4. tadpoles, and horseshoes, and chaos, OH MY! (orbits) 5. tiger stripes on Enceladus warmer than Titan’s surface 6. GORGEOUS Callisto has one of the oldest surfaces in the SS 7. a body can’t be tidally locked if it has an elliptical ORBIT 8. Earth is an oblate spheroid and not flat … 9. tough to live on Mars because of UV radiation 10. 3 cloud layers on jovian planets 11. water hole is the region observed for SETI 12. much aromatic waste is discussed at AAS meetings when discussing exoplanet compositions, etc. 13. Earth’s atm is really snug compared to other terrestrials 14. Jupiter is still differentiating 15. climate change may kill us all … or at least make us very sweaty 16. Uranus and Neptune are NOT twins 17. Titan is the most Earth-like place in SS … good place to have Todds? 18. clathrates are crystalline H2O structures with impurities 19. TNO #4 did not show up until 1992 20. geoid maps tell you about planetary interiors

  31. Where is this?

  32. …………………………

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