Astr 102 exam Study guides, Class notes & Summaries
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ASTR 102 exam 2024| Questions with 100% Solutions| A Rated
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What are the Milky Way Galaxy's spiral arms? - The spiral arms are places where stars are formed 
from clouds of gas and dust 
Where are you in the Universe? If you had to give directions to your location in the Universe, what 
directions would you give? - We are the third planet away from the Sun. Our Solar System is 
located in one of the spiral arms of the Milky Way Galaxy, one within the Local Group of galaxies 
Why do astronomers now label Pluto a "dwarf planet"? - Due to its small size ...
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ASTR 102 exam With Questions & 100% Solutions| A Guaranteed
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Consider a spectroscopic binary star system in which the spectra of both stars are observed. If Star A is 
more massive than Star B, which star has the greater orbital velocity? 
a) Star A 
b) Star B 
c) They both have the same velocity d) The star that is closest to the center of mass 
e) It depends on where they are in their orbits - Consider a spectroscopic binary star system in 
which the spectra of both stars are observed. If Star A is more massive than Star B, which star has the 
greater o...
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ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version
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ASTR 102 Midterm Exam Questions | 
100% Correct Answers | Verified | Latest 
2024 Version
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ASTR 102 exam Prep Questions & 100% Solutions| A Guaranteed
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Which of the following statements about light focusing is not true? 
A) In a healthy eye, light is focused on the retina. 
B) Film should be placed at the focal plane in a camera. 
C) If you try to look at an image that is not formed at the focal plane, it will be blurry. 
D) The focal plane of a reflecting telescope is always located within a few inches of the primary mirror. - 
D) The focal plane of a reflecting telescope is always located within a few inches of the primary 
mirror. 
Suppose t...
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ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version
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ASTR 102 Midterm Exam Questions | 
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ASTR 102 exam Questions & 100% Solutions (Verified Answers)
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D) the same no matter how or where you measure the object's weight. - The mass of an object is 
A) the same as the weight of the object. 
B) larger than the weight of the object. 
C) unrelated to the weight of the object. 
D) the same no matter how or where you measure the object's weight. 
A) halved. - If an object's velocity is halved, its momentum is 
A) halved. 
B) unchanged, 
C) doubled 
D) quadrupled 
E) dependent on its acceleration.
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ASTR 102 exam| Questions with 100% Solutions| A Rated
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Human technology seems on the verge of providing something on earth that the stars use all the time: 
thermonuclear reactions. This would give us a virtually inexhaustible supply of energy, but we face one 
particularly difficult problem namely: - we need to contain the hot hydrogen somehow. Since it 
has to be a temperature of several million degrees, ordinary material containers will not do it 
When we speak of the 'uniform' expansion of the universe - the behaviour is best understood as a 
...
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ASTR 102 exam 2 2024| Questions with 100% Solutions| A Rated
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Rank the following from earliest to latest: protostars, dark globule, star cluster, supernova - Dark 
globule, protostars, supernova, star cluster 
Which type of light will be most affected by interstellar extinction? - Ultraviolet 
Globular clusters formed _______________ the gas from which our galaxy formed had time to collapse 
into a disk. - before 
The first stage of stellar evolution is the ___________________ phase - protostellar 
Time moves slower the _____________ you're moving - faste...
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ASTR 102 Midterm Exam Questions | 100% Correct Answers | Verified | Latest 2024 Version
- Exam (elaborations) • 34 pages • 2024
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The apparent motion of a foreground object relative to a distant background as the observers position 
changes? - Parallax 
When measuring parallax the distance between two observation points is called? - Baseline 
If Earth rotated twice as fast as it currently does, but its motion around the Sun stayed the same, then? 
A. The night would be twice as long 
B. The night would be half as long 
C. The year would be half as long 
D. The length of the day would be unchanged. - B. 
A long, thin cloud ...
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ASTR 102 Actual exam With Questions & 100% Solutions| A Guaranteed
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Quiz Not good place to build Observatory? - Australia (because of fire disaster) 
Best Location for an Observatory - 1. Big Island of Hawaii 
2. Andes Mtn Chile 
3. San Diego 
Dots - Stars in our galaxies 
blobs - Typically galaxies, 10% could be dead stars 
Light - Acts as 
1. Weight 
2. A Particle