LECTURE 20, NOVEMBER 9, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010

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a) a beam of light. b) a massive object. c) neutrinos. d) antimatter. e) All of the above are correct. Question 6 The force of gravity can pull on

a) a beam of light. b) a massive object. c) neutrinos. d) antimatter. e) All of the above are correct. Question 6 The force of gravity can pull on Gravity is described by general relativity as a bending of space, and all particles, including photons, move through warped space along curved paths.

ASTR 101-3, FALL 20108

a) is the point where X rays emerge. b) is the physical surface of the hole. c) defines the outer edge of an accretion disk. d) is measured by the Schwarzschild radius. e) extends for millions of miles into space. Question 8 The event horizon of a black hole

a) is the point where X rays emerge. b) is the physical surface of the hole. c) defines the outer edge of an accretion disk. d) is measured by the Schwarzschild radius. e) extends for millions of miles into space. Question 8 The event horizon of a black hole The event horizon is the surface of an imaginary sphere around a collapsed object inside of which nothing, including light, can escape.

ASTR 101-3, FALL

ASTR 101-3, FALL

ASTR 101-3, FALL

ASTR 101-3, FALL

ASTR 101-3, FALL

Question 5 Cygnus X-1 is a) NASA’s latest X-ray orbiting telescope. b) a millisecond pulsar with three planets. c) the strongest X-ray eclipsing binary system. d) a likely black hole binary star system. e) the first gamma-ray burster spotted in X rays.

Question 5 Cygnus X-1 is Cygnus X-1 is an X-ray source with one visible star orbited by an unseen companion of at least 10 solar masses, and very rapid changes in the signal indicating a small source. a) NASA’s latest X-ray orbiting telescope. b) a millisecond pulsar with three planets. c) the strongest X-ray eclipsing binary system. d) a likely black hole binary star system. e) the first gamma-ray burster spotted in X rays.

ASTR 101-3, FALL

TEST REVIEW-SOURCE OF QUESTIONS From Mastering Astronomy Homework: 11 From Publisher, Difficulty Level 1(Easiest): 15 From Publisher, Difficulty Level 2: 14 From Publisher, Difficulty Level 3: None Of the 40 Questions, 26 or 65% are at the Easiest Level ASTR 101-3, FALL

REVIEW, CHAPTER 9 THE SUN Basics: Interior, Convection Zone, Photosphere, Corona Solar Constant, Solar Rotation, Sunspot Cycle Origin of Solar Wind Sun’s Energy Source ASTR 101-3, FALL

REVIEW, CHAPTER 10 THE STARS Parallax, Parsec, Absolute Magnitude H-R Diagram, Main Sequence, Giants, Supergiants, Planetary Nebulae, White Dwarfs Binaries and Masses, Sizes of Stars Main Sequence Lifetimes ASTR 101-3, FALL

REVIEW, CHAPTER 11 ISM & STAR FORMATION ISM Gas Composition, 21-cm Radiation Dust, Reddening, Dark Areas Star Formation Philosophy of Stellar Evolution Studies Star Clusters and H-R Diagrams ASTR 101-3, FALL

REVIEW, CHAPTER 12 STELLAR EVOLUTION (+White Dwarfs) Evolution of Sun-like Stars, White Dwarfs Evolution of Massive Stars, Which Elements Can Undergo Fusion Cluster Ages Novae Chandrasekhar Limit, Type I and Type II Supernovae ASTR 101-3, FALL

REVIEW, CHAPTER 13 NEUTRON STARS & BLACK HOLES Evidence for Supernovae, Remnants, Crab Nebula Formation of the Elements Neutron Stars, Pulsars Spacetime and Gravity, Black Holes, Event Horizon, Cygnus X-1 ASTR 101-3, FALL