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

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Presentation on theme: "LECTURE 27, DECEMBER 9, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010."— Presentation transcript:

1 LECTURE 27, DECEMBER 9, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010

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7 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. Question 1 The Drake equation attempts to define the number of

8 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. Question 1 The Drake equation attempts to define the number of

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10 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. Question 4 The habitable zone is the area where

11 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. Question 4 The habitable zone is the area where Stellar habitable zones

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15 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. Question 6 The water hole is a region

16 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. Question 6 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

18 REVIEW, CHAPTER 14 THE MILKY WAY GALAXY Milky Way Galaxy-Basic structure (disk, halo, bulge), type, motions, Suns 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

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

20 REVIEW, CHAPTER 16 GALAXIES 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

21 REVIEW, CHAPTER 17-1 COSMOLOGY 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

22 REVIEW, CHAPTER 17-2 COSMOLOGY 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

23 REVIEW, CHAPTER 18 LIFE 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


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