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LECTURE 27, DECEMBER 9, 2010

LECTURE 27, DECEMBER 9, 2010. ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu. Question 1. a) planets in the Milky Way Galaxy. b) planets with life in the universe. c) stars with planets like Earth. d) civilizations in our Galaxy. e) terrestrial planets with water.

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LECTURE 27, DECEMBER 9, 2010

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  1. LECTURE 27, DECEMBER 9, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu ASTR 101-3, FALL 2010

  2. ASTR 101-3, FALL 2010

  3. ASTR 101-3, FALL 2010

  4. ASTR 101-3, FALL 2010

  5. ASTR 101-3, FALL 2010

  6. ASTR 101-3, FALL 2010

  7. Question 1 a) planets in the Milky Way Galaxy. b) planets with life in the universe. c) stars with planets like Earth. d) civilizations in our Galaxy. e) terrestrial planets with water. The Drake equation attempts to define the number of

  8. Question 1 a) planets in the Milky Way Galaxy. b) planets with life in the universe. c) stars with planets like Earth. d) civilizations in our Galaxy. e) terrestrial planets with water. The Drake equation attempts to define the number of

  9. ASTR 101-3, FALL 2010

  10. Question 4 a) temperatures on a planet are reasonable. b) terrestrial planets can form around a star. c) terrestrial planets could have liquid water on their surfaces. d) liquid water can condense into rain in the atmosphere. e) Sun-like stars can exist in the Milky Way Galaxy. The habitable zone is the area where

  11. Question 4 a) temperatures on a planet are reasonable. b) terrestrial planets can form around a star. c) terrestrial planets could have liquid water on their surfaces. d) liquid water can condense into rain in the atmosphere. e) Sun-like stars can exist in the Milky Way Galaxy. The habitable zone is the area where Stellar habitable zones

  12. ASTR 101-3, FALL 2010

  13. ASTR 101-3, FALL 2010

  14. ASTR 101-3, FALL 2010

  15. Question 6 a) in radio light where natural emissions from our Galaxy are minimal. b) on Mars where liquid water has been proven to exist in the past. c) on the Moon where water is believed to exist under ice in a deep crater. d) in the Oort cloud where comets rich in water are formed. The “water hole” is a region

  16. Question 6 a) in radio light where natural emissions from our Galaxy are minimal. b) on Mars where liquid water has been proven to exist in the past. c) on the Moon where water is believed to exist under ice in a deep crater. d) in the Oort cloud where comets rich in water are formed. The “water hole” is a region The “water hole” may be the best part of the electromagnetic spectrum for intelligent civilizations to communicate across the vast reaches of space.

  17. TEST NO. 4 • TIME: Tuesday, December 14, 2010, 12:30 PM • PLACE: Regener 103 • MATERIAL: Topics covered since Test No. 3 • NO. 2 PENCIL: Bring one! ASTR 101-3, FALL 2010

  18. REVIEW, CHAPTER 14THE MILKY WAY GALAXY • Milky Way Galaxy-Basic structure (disk, halo, bulge), type, motions, Sun’s location, formation • Important variable stars-RR Lyrae stars, Cepheids • Spiral arms-Winding problem, density wave theory, 21-cm line • Rotation curve and dark matter • Central region-Sgr A*, star orbits, black hole ASTR 101-3, FALL 2010

  19. REVIEW, CHAPTER 15NORMAL AND ACTIVE GALAXIES • Types of galaxies(spirals, barred spirals, ellipticals), Hubble’s classification • Irregular galaxies, Magellanic Clouds • Distance ladder, Standard Candles (Tully-Fisher relation, Type I supernovae) • Clusters of galaxies • Hubble’s Law, Hubble’s constant, red shifts • Active galaxies, time variations, colliding galaxies • Quasars-distances, central engines, and massive black holes ASTR 101-3, FALL 2010

  20. REVIEW, CHAPTER 16GALAXIES AND DARK MATTER • Dark matter clues– rotation curves, clusters of galaxies, Head-Tail galaxies, gravitational lensing, Bullet Cluster • Look-back time • Galaxy formation and evolution, starburst galaxies, central black holes • Galaxy surveys, large-scale structure of the universe • Matter in the universe is mostly dark ASTR 101-3, FALL 2010

  21. REVIEW, CHAPTER 17-1COSMOLOGY • Cosmological principle, Olbers’ paradox • Big Bang, expansion of the universe, Hubble time, fate of the universe • Curvature of space • Cosmic acceleration, dark energy, mass-energy composition of the universe ASTR 101-3, FALL 2010

  22. REVIEW, CHAPTER 17-2COSMOLOGY • Cosmic Microwave Background (CMB), origin, Penzias and Wilson • Element formation in the Big Bang • Inflation, horizon problem, flatness problem • Large-scale structure formation ASTR 101-3, FALL 2010

  23. REVIEW, CHAPTER 18LIFE IN THE UNIVERSE • Necessary chemical compounds are wide-spread in the cosmos • Miller-Urey experiment, amino acids • Drake equation, habitable zones, estimated number of advanced civilizations in our Galaxy • Extra-terrestrial communication, “Water-Hole” ASTR 101-3, FALL 2010

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