Week 2 (9/27)

1
Week 2 (9/27) Opinion PollI am taking this
class because

1. This was the only class that fit my insanely busy
   schedule
2. I adore astronomy and feel like I have to learn
   more about the Universe
3. The TAs in this class really rock!
4. Planets are my passion
5. I need this class to satisfy my Q requirement

2
Week 2 (9/29) Quiz 1Which one of the
following is FALSE

1. There are eight planets in our Solar System
2. The expansion of the Universe is accelerating
   because of the anti-gravity-like effect of an
   entity known as Dark Energy
3. Most of the matter in the Universe is
   non-luminous and is referred to as Dark Matter
4. The nearest galaxy to the Milky Way is 4 light
   years away
5. Astronomers have inferred the presence of planets
   and planetary systems around several stars in our
   Galaxy

3
Week 2 (9/29) Quiz 2Which one of the
following is TRUE

• When galaxies collide, it is very common for
  stars to smash into each other
• Primordial density fluctuations grow under the
  influence of the electromagnetic force
• Large galaxies are assembled by the merging of
  smaller galaxies
• The furthest galaxies we can see from Earth are
  100 billion light years away

4
Week 2 (9/29) Quiz 3Which one of the
following is TRUE

• The Sun and Solar System lie about 1,000 light
  years from the center of the Milky Way galaxy
• The carbon, nitrogen, and oxygen present in the
  Sun and Earth were synthesized in nuclear fusion
  reactions in the Suns core
• Mature galaxies tend to look more straggly than
  infant galaxies
• The subtle ripples in the density of the early
  Universe from which galaxies formed are visible
  in the Big Bangs afterglow