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ASTRO EXAM 4 PSU QUESTIONS WITH COMPLETE SOLUTIONS
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ASTRO EXAM 4 PSU QUESTIONS WITH COMPLETE SOLUTIONS ASTRO EXAM 4 PSU QUESTIONS WITH COMPLETE SOLUTIONS
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ASTRO EXAM 4 PSU 2024-2025 QUESTIONSWITH COMPLETE SOLUTIONS
How many powers of ten separate the approximate diameter of Earth from the diameter
of our Solar System? - CORRECT ANSWER 6
How many powers of ten separate the diameter of the Solar System and the diameter of
the Milky Way Galaxy? - CORRECT ANSWER 8
How much bigger is the Earth than quarks (tiny sub-atomic particles)? - CORRECT
ANSWER 10^23 times
What is the name of the nearest large spiral galaxy to our own Milky Way, in the Local
Group? - CORRECT ANSWER The Andromeda Galaxy
Which Galaxy do you come from? - CORRECT ANSWER The Milky Way Galaxy
Why is our galaxy called the Milky Way? - CORRECT ANSWER The term "Milky Way
Galaxy" is derived from the Greek word for milk, and there appeared to be a stream of
milk running across the sky
What kind of galaxy is the Milky Way? - CORRECT ANSWER Spiral
What color of stars are found in the young star clusters in the disk of the Whirlpool
galaxy? - CORRECT ANSWER Blue
,ASTRO EXAM 4 PSU 2024-2025 QUESTIONS
WITH COMPLETE SOLUTIONS
Why do hydrogen clouds glow red? - CORRECT ANSWER Electromagnetic radiation
from nearby stars heats the clouds until they glow red.
Why are there dark lines in the spiral arms of the Whirlpool Galaxy? - CORRECT
ANSWER They are regions of dust that block the light of the stars behind them
In what part of spiral galaxies do new stars form? - CORRECT ANSWER In the spiral
arms
Why cant Thomasin find any constellations she recognizes? - CORRECT ANSWER
From any position far outside the Solar System, the stars are seen at different angles
and fall out of the constellations' traditional shapes.
What causes the long tail to protrude from this galaxy? - CORRECT ANSWER Tidal
forces caused by interaction with another galaxy are drawing the material off
Why are the star clusters in the tidal tail blue? - CORRECT ANSWER Blue stars in
these newly active star-forming regions far outshine the less massive red stars
Can we see the intruder galaxy in the image? - CORRECT ANSWER Yes
Compared to spiral galaxies, elliptical galaxies have... - CORRECT ANSWER ...less
gas, less dust, and less new star formation
, ASTRO EXAM 4 PSU 2024-2025 QUESTIONS
WITH COMPLETE SOLUTIONS
Among spiral galaxies, an "SBa" has... - CORRECT ANSWER ...a bar, tight smooth
spiral arms, and a large bulge
What is the difference between an E0 galaxy and an E7 galaxy? - CORRECT ANSWER
The E7 has and oval shape and the E0 is circular, The E0 is circular and the E7 more
elongated
What category do astronomers use if a galaxy does not fit into the spiral or elliptical
category? - CORRECT ANSWER Irregular
What happens to the planets in a galaxy when the galaxy collides with another galaxy? -
CORRECT ANSWER Nothing, because the spaces between stellar systems in a galaxy
is much larger than their size
What kid of galaxy will be the final result from the collision of the Milky Way and
Andromeda galaxies? - CORRECT ANSWER A large elliptical
What is the result when gas clouds from both of the colliding galaxies meet? -
CORRECT ANSWER The clouds crushing down on each other starts a burst of new star
formation
What are the 3 parts of this type of galaxy, and which 2 might you see through a
telescope? - CORRECT ANSWER Disk, bulge, and halo; would see bulge and disk,
and wouldn't see halo
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