ASTR 102 Final Exam Questions Riverside Correct Solutions Current Update
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Course
ASTR 102
Institution
ASTR 102
ASTR 102 Final Exam Questions Riverside Correct Solutions Current Update
order of red giant's life - Answer -Red Giant → Planetary Nebula → White Dwarf → Black Dwarf
or
Red Giant → Type II Supernova → Neutron Star
or
Red Giant → Type II Supernova → Black Hol
The eventual f...
ASTR 102 Final Exam Questions
Riverside Correct Solutions Current
Update
order of red giant's life - Answer -Red Giant → Planetary Nebula → White Dwarf →
Black Dwarf
or
Red Giant → Type II Supernova → Neutron Star
or
Red Giant → Type II Supernova → Black Hol
The eventual fate of our Sun is to - Answer -become a steadily cooling white dwarf.
Our Sun will not become a nova because this only happens to stars - Answer -with a
binary companion.
Black holes are formed by - Answer -supernovae from the most massive stars.
Which of the following lists, in the correct order, a possible evolutionary path for a star?
- Answer -Red Giant, Planetary Nebula, White Dwarf
For a white dwarf to become a nova it is necessary for it to - Answer -have a binary
companion.
Imagine that you could travel at the speed of light. Starting from Earth, how long would it
take you to travel to the center of the Milky Way Galaxy? - Answer -25,000 years
approximate distance from the sun to the center of the Milky Way - Answer -25,000 ly
Where is our Sun located in the Milky Way Galaxy? - Answer -about half way between
the center and the outer edge
Which of the following correctly lists objects from largest to smallest? - Answer -Local
Group, Galaxy, Nebula, Star
Fifteen years ago, a quasar was observed that was found to be located 8 billion light
years
away. If our universe is approximately 15 billion years old, when did the quasar emit the
light that we observe? - Answer -8 billion years ago
Your satellite orbits close to the Sun and detects a solar flare erupting at 10:00 PM, as
, measured by the satellite's clock. Your clock is exactly synchronized with the satellite
clock. The Sun is located 8 light minutes away from Earth. If you wish to observe this
flare from you backyard, you need to look at what time? - Answer -10:08 PM.
Imagine that you simultaneously receive the satellite transmission of two pictures of two
people that live on planets orbiting two different stars. Each image shows the people at
their 21st birthday parties. Consider the following possible interpretations that could be
made from your observations. Which do you think is the most plausible interpretation? -
Answer -The person that is farther from you is actually the older of the two people.
According to modern ideas and observations, what can be said about the location of the
center of our expanding universe? - Answer -The universe does not have a center.
If our universe is expanding, what are the implications for the separation between two
stars within our galaxy? - Answer -The distance between the two stars is unaffected.
Which of the following conclusions can you draw about the expansion of the universe
from the drawing shown? - Answer -All galaxies appear to move away from each other
during the expansion of the universe.
You observe a star rising due east. When this star reaches its highest position above
the
horizon, where will it be? - Answer -high in the southern sky
How much of the celestial sphere can an Earth observer see at one time? - Answer -
exactly half
You are observing the sky from your southern hemisphere location in Australia. You see
a
star rising directly to the east. When this star reaches its highest position above the
horizon, where will it be? - Answer -high in the northern sky
Stars that never appear to set are called circumpolar. As you move from Earth's equator
toward the North Pole, the number of stars that are circumpolar - Answer -increases.
Imagine you are standing somewhere on the Equator. Of the stars that you can see,
roughly how many of these stars are circumpolar? - Answer -none
Imagine you are standing in the northern hemisphere. Looking directly north, you see a
star just above the horizon. A little later you notice that it has shifted position slightly.
Which way did it move? - Answer -to the right, (east)
You are looking toward the north and see the Big Dipper to the right of Polaris. Fifteen
minutes later, the Big Dipper will appear to have moved in roughly what direction? -
Answer -up (away from the horizon)
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