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LECTURE 25, DECEMBER 2, 2010

LECTURE 25, DECEMBER 2, 2010. ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu. Question 2. a) the size of the universe. b) the age of the universe. c) the shape of the universe. d) the temperature of the universe. e) the distance the universe has expanded.

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LECTURE 25, DECEMBER 2, 2010

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  1. LECTURE 25, DECEMBER 2, 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 2 a) the size of the universe. b) the age of the universe. c) the shape of the universe. d) the temperature of the universe. e) the distance the universe has expanded. Hubble’s constant, H0, can be related to

  8. Question 2 a) the size of the universe. b) the age of the universe. c) the shape of the universe. d) the temperature of the universe. e) the distance the universe has expanded. Hubble’s constant, H0, can be related to H0 is currently estimated to be about 70 km/sec/Mpc. This translates to an age for the universe of about 14 billion years.

  9. Question 8 a) there is more matter than energy. b) the universe is closed, and will recollapse. c) the universe is open, and will keep expanding. d) dark matter will dominate, and galaxies will stop expanding. e) there was more helium than hydrogen created in the Big Bang. If the density of the universe is greater than “critical”,

  10. Question 8 a) there is more matter than energy. b) the universe is closed, and will recollapse. c) the universe is open, and will keep expanding. d) dark matter will dominate, and galaxies will stop expanding. e) there was more helium than hydrogen created in the Big Bang. If the density of the universe is greater than “critical”,

  11. ASTR 101-3, FALL 2010

  12. ASTR 101-3, FALL 2010

  13. ASTR 101-3, FALL 2010

  14. Question 5 a) evidence supporting the Big Bang. b) proof that the universe is getting warmer. c) a result of the hot intergalactic gas between clusters. d) the observable form of dark energy. e) released from the first generation of stars in the universe. The cosmic microwave background radiation is

  15. Question 5 a) evidence supporting the Big Bang. b) proof that the universe is getting warmer. c) a result of the hot intergalactic gas between clusters. d) the observable form of dark energy. e) released from the first generation of stars in the universe. The cosmic microwave background radiation is The radiation observed is the “fossil remnant” of the primeval fireball that existed at the very beginning of the universe.

  16. ASTR 101-3, FALL 2010

  17. ASTR 101-3, FALL 2010

  18. COSMOLOGY SUMMARY • Time since the Big Bang = 13.7 billion yrs. • First stars at 400 million years • The Universe is flat or Ωo = 1 • CONTENTS: Ordinary Matter = 4%; Dark Matter = 22%; Dark Energy = 74% ASTR 101-3, FALL 2010

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