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ASTRO 1 Exam 4 Study Guide 2025 – Astronomy Final
Review, Practice Questions, Flashcards & Key Concepts
Explained
ASTRO 1 exam 4 study guide 2025
ASTRO 1 astronomy exam 4 review
astronomy exam 4 questions and answers
ASTRO 1 flashcards and notes
college astronomy final exam prep
ASTRO 1 exam 4 topics explained
introduction to astronomy exam 4
What type of stars does the bar contain?
A: old, cool stars that glow redder
B: young, cool stars that glow bluer
C: old, hot stars that glow bluer
D: old, cold stars that glow bluer - ANSWER-A: old, cool stars that glow redder
What color are the star clusters in the spiral arms and what does that mean?
A: red and means they are old
B: read and means they have formed recently
C: blue and means they are old
D: blue and means they have formed recently
E: black and means they are covered in dust - ANSWER-D: blue and means they have formed
recently
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The ___ regions contain only old stars. The younger ones have ended their lives. And the ___
regions contain both young and old stars and the young, more luminous ones dominate the
light.
A: red, blue
B: red, red
C: blue, blue
E: blue, red - ANSWER-A: red, blue
Based on information about the Milky Way and Andromeda...
A: the collision starts at 8 billion years in the move and is completed by 9 billion years
B: the collision stars at about 1 billion years in the move and is completed by 3 billion years
C: the collision stars just after 5 billion years in the move and is completed by 8 billion years
D: the collision stars just after 3 billion years in the move and is complete a bit after 5 billion
years
E: never collide - ANSWER-D: the collision stars just after 3 billion years in the move and is
complete a bit after 5 billion years
What kind of galaxies are the largest in our Universe?
A: spiral
B: irregular
C: elliptical - ANSWER-C: elliptical
The galaxies near Andromeda looked like:
A: an oval shaped haze
B: beautiful spiral patterns
C: stars
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D: clumpy, irregular structures - ANSWER-A: an oval shaped haze
Whats true of irregular galaxies
A: they have spiral arms but are smaller than spiral galaxies
B: the have regular smooth structures
C: they are usually larger than spiral galaxies
D: they have no defined shape or structure - ANSWER-D: they have no defined shape or
structure
What do spiral arms contain?
A: the hottest, newest stars
B: the coldest, newest stars
C: the hottest, oldest stars
D: the coldest, oldest stars - ANSWER-A: the hottest, newest stars
In the symbol for the Hubble type of a galaxy, sbc, the "B" denotes-
A: tightly wound spiral arms
B: the presence of a bar
C: the presence of a ring
D: a large bulge component
E: loosely wound spiral arms - ANSWER-B: the presence of a bar
What happens to the planets in a galaxy when that galaxy collides with another galaxy?
A: smaller stars collide with each other, forming more massive stars that swallow the planets
B: they are pulled out of their orbits by the tidal forces of the intruding galaxy
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C: they accrete a whole lot of new matter and become stars themselves
D: Nothing, because the spaces between stellar systems in a galaxy is much larger than their size
E: they ignite completely and explode violently - ANSWER-D: Nothing, because the spaces
between stellar systems in a galaxy is much larger than their size
Which properties of spiral galaxies allow us to sub classify them as Sa, Sb, or Sc?
A: size of bulge and extent of spiral arms
B: color of stars in the disk
C: shape of halo
D: size of disk
E: orientation - ANSWER-A: size of bulge and extent of spiral arms
Compared to spiral galaxies, elliptical galaxies have-
A: more gas, redder colors, and less new star formation
B: Less gas, bluer colors, and less new star formation
C: more gas, bluer colors, and more new star formation
D: Less gas, redder colors, and less new star formation
E: Less gas, bluer colors, and more new star formation - ANSWER-D: Less gas, redder colors, and
less new star formation
What is the difference between an E0 and an E7 galaxy?
A: the E7 has an oval shape and the E0 is circular
B: the E7 has a larger disk than the E0
C: the E7 has a smaller disk than the E0
D: the E7 has a circular shape and the E0 is oval
E: there is no such thing as an E0 galaxy - ANSWER-A: the E7 has an oval shape and the E0 is
circular
ASTRO 1 Exam 4 Study Guide 2025 – Astronomy Final
Review, Practice Questions, Flashcards & Key Concepts
Explained
ASTRO 1 exam 4 study guide 2025
ASTRO 1 astronomy exam 4 review
astronomy exam 4 questions and answers
ASTRO 1 flashcards and notes
college astronomy final exam prep
ASTRO 1 exam 4 topics explained
introduction to astronomy exam 4
What type of stars does the bar contain?
A: old, cool stars that glow redder
B: young, cool stars that glow bluer
C: old, hot stars that glow bluer
D: old, cold stars that glow bluer - ANSWER-A: old, cool stars that glow redder
What color are the star clusters in the spiral arms and what does that mean?
A: red and means they are old
B: read and means they have formed recently
C: blue and means they are old
D: blue and means they have formed recently
E: black and means they are covered in dust - ANSWER-D: blue and means they have formed
recently
,2|Page
The ___ regions contain only old stars. The younger ones have ended their lives. And the ___
regions contain both young and old stars and the young, more luminous ones dominate the
light.
A: red, blue
B: red, red
C: blue, blue
E: blue, red - ANSWER-A: red, blue
Based on information about the Milky Way and Andromeda...
A: the collision starts at 8 billion years in the move and is completed by 9 billion years
B: the collision stars at about 1 billion years in the move and is completed by 3 billion years
C: the collision stars just after 5 billion years in the move and is completed by 8 billion years
D: the collision stars just after 3 billion years in the move and is complete a bit after 5 billion
years
E: never collide - ANSWER-D: the collision stars just after 3 billion years in the move and is
complete a bit after 5 billion years
What kind of galaxies are the largest in our Universe?
A: spiral
B: irregular
C: elliptical - ANSWER-C: elliptical
The galaxies near Andromeda looked like:
A: an oval shaped haze
B: beautiful spiral patterns
C: stars
,3|Page
D: clumpy, irregular structures - ANSWER-A: an oval shaped haze
Whats true of irregular galaxies
A: they have spiral arms but are smaller than spiral galaxies
B: the have regular smooth structures
C: they are usually larger than spiral galaxies
D: they have no defined shape or structure - ANSWER-D: they have no defined shape or
structure
What do spiral arms contain?
A: the hottest, newest stars
B: the coldest, newest stars
C: the hottest, oldest stars
D: the coldest, oldest stars - ANSWER-A: the hottest, newest stars
In the symbol for the Hubble type of a galaxy, sbc, the "B" denotes-
A: tightly wound spiral arms
B: the presence of a bar
C: the presence of a ring
D: a large bulge component
E: loosely wound spiral arms - ANSWER-B: the presence of a bar
What happens to the planets in a galaxy when that galaxy collides with another galaxy?
A: smaller stars collide with each other, forming more massive stars that swallow the planets
B: they are pulled out of their orbits by the tidal forces of the intruding galaxy
, 4|Page
C: they accrete a whole lot of new matter and become stars themselves
D: Nothing, because the spaces between stellar systems in a galaxy is much larger than their size
E: they ignite completely and explode violently - ANSWER-D: Nothing, because the spaces
between stellar systems in a galaxy is much larger than their size
Which properties of spiral galaxies allow us to sub classify them as Sa, Sb, or Sc?
A: size of bulge and extent of spiral arms
B: color of stars in the disk
C: shape of halo
D: size of disk
E: orientation - ANSWER-A: size of bulge and extent of spiral arms
Compared to spiral galaxies, elliptical galaxies have-
A: more gas, redder colors, and less new star formation
B: Less gas, bluer colors, and less new star formation
C: more gas, bluer colors, and more new star formation
D: Less gas, redder colors, and less new star formation
E: Less gas, bluer colors, and more new star formation - ANSWER-D: Less gas, redder colors, and
less new star formation
What is the difference between an E0 and an E7 galaxy?
A: the E7 has an oval shape and the E0 is circular
B: the E7 has a larger disk than the E0
C: the E7 has a smaller disk than the E0
D: the E7 has a circular shape and the E0 is oval
E: there is no such thing as an E0 galaxy - ANSWER-A: the E7 has an oval shape and the E0 is
circular
