for Chapter 1
this picture. What does it tell us about the
can you use the apparent brightness of an object to tell its distance?
are we in the Universe?
can you use the angular size of an object to tell its distance?
do we mean by a geocentric universe? In broad terms contrast a
geocentric view of the universe with our modern view of the universe. Briefly describe the major levels
of structure (such as planet, star, galaxy) in the universe.
do we mean when we say that the universe is expanding? How does
expansion lead to the idea of the Big Bang?
determines the chemistry of the universe?
there variations in chemical composition from place to place in the
Universe? If so, what causes them? [Think small scale and then large
did Carl Sagan mean when he said that we are "star stuff "?
- What does chemical change have to do
with the abundance of life in the Universe? Is timing important?
would the Universe be different if it were 1 billion years old? If it were, 100 billion years old?
the statement ÔThe farther away we look in distance, the further back
we look in time.Õ
old is the universe? How can
key observations by Edwin Hubble lead us to conclude that the universe is
expanding? Use the raisin cake model to explain how these observations
do we mean by the observable universe? Is it the same thing as the
is the shape of the Milky Way Galaxy? Where is our solar system located
within the galaxy? How does our solar system move within the galaxy?
between our galaxy's disk and halo. Where do most visible stars
reside? Where does the mysterious dark matter seem to reside?
are we moving in the universe?