AST-101 Module 05 Quiz C Question 1 of 15 A key piece of…

AST-101 Module 05 Quiz C
Question
1 of 15
A key piece of evidence that leads astronomers to conclude that most galaxies include a supermassive black hole in the center is that
high-speed disks of gas are observed in the central parsecs of other galaxies
the mass of all galaxies is much more than expected based on the visible material in the galaxy
streamers of gas from stars that have been torn apart are detected in most galactic centers
stars near the center of other galaxies are orbiting more rapidly than expected
Which of the following is NOT a characteristic of the stars of the disk component of our galaxy?
Higher metal abundance
Circular orbits
Young stars
Randomly inclined orbits
Harlow Shapley made the first accurate determination of the position of the center of the galaxy by studying
globular clusters
open clusters
spiral tracers

emission nebulae
Harlow Shapley made the first accurate determination of the position of the center of the galaxy by studying
globular clusters
open clusters
spiral tracers

emission nebulae
The disk of our galaxy consists of
only stars
the nine known planets
quasars
stars, dust, and gas
Compared to other spiral galaxies, the Milky Way is
larger and brighter than most spirals
smaller and dimmer than most spirals
comparable to the smallest and dimmest spirals known
very average in size and luminosity
An elliptical galaxy could
be formed from the collision and merger of spiral galaxies
evolve from a single spiral galaxy when the spiral has used up all of its gas and dust
become a starburst galaxy if it were to move through the hot intergalactic medium of a cluster
evolve into an irregular galaxy when it has used up all of its gas and dust
The rotation curve of a galaxy can be used to determine
the mass of the galaxy
the relative number of hot young stars in the galaxy
the relative amount of gas and dust in the galaxy
the radius of the galaxy
Which of the following is true about galactic collisions?
They will cause stars in each galaxy to collide and trigger supernova events.
They only happen in poor clusters.
They are very rare, since few galaxies are in clusters.
They often trigger bursts of star formation.
Galactic cannibalism refers to
the destruction of a galaxy’s globular clusters by the galaxy’s nucleus
galaxies drawing in gas from the intergalactic medium
binary galaxies
the merging of galaxies
What is the primary factor in determining the classification for an elliptical galaxy?
Shape
Mass
Color
Size
Edwin Hubble and Milton Humason discovered that there was a linear relationship between a galaxy’s
apparent recession velocity and distance
rotation curve and distance
age and distance
mass and luminosity
If Galaxy A is found to have a recessional velocity four times greater than Galaxy B, what can be said about their relative distances from Earth?
Galaxy A is four times further away from Earth than Galaxy B.
Galaxy A is two times further away from Earth than Galaxy B.
Galaxy A is four times closer to Earth than Galaxy B.
Galaxy A is two times closer to Earth than Galaxy B.
A group of one hundred to a few thousand stars in a region of 25 pc in diameter that were created at the same time and our bound together by gravity is called a(n) ________ cluster.
globular
closed
open
associated

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