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Galactic Dynamics Online Flashcards and Quiz
By presenting 3 options to choose from, Galactic Dynamics Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Galactic Dynamics Questions and Answers and click over the correct answer.
- Test Name: Galactic Dynamics MCQ Quiz Practice
- Type: MCQ’s
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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Galactic Dynamics Flashcards
What is the term for the phenomenon where galaxies are moving away from each other due to the expansion of the universe?
Cosmic Expansion
Which of the following is a measure of the spread of velocities among stars within a galaxy?
Velocity Dispersion
What is the term for the process by which galaxies lose their gas and dust due to gravitational interactions with neighboring galaxies?
Ram Pressure Stripping
Which of the following is a proposed explanation for the observed alignment of satellite galaxies around more massive galaxies?
Galaxy Alignment Bias
What is the name of the spherical distribution of stars and dark matter that surrounds the central regions of a galaxy and is typically more massive than the visible components?
Galactic Halo
Which of the following is a method used to estimate the mass of a galaxy by analyzing the gravitational lensing effects on background objects?
Strong Lensing
What is the term for the process by which galaxies collide and merge, leading to the formation of larger galaxies?
Galactic Merger
Which of the following is a proposed mechanism for the formation of galaxy clusters?
Hierarchical Clustering
What is the name of the spherical distribution of stars and dark matter that surrounds the central regions of a galaxy and extends far beyond its visible edge?
Galactic Halo
Which of the following is a method used to estimate the mass of a galaxy by measuring the velocities of its satellite galaxies?
Satellite Kinematics
What is the term for the process by which galaxies exchange material through gravitational interactions?
Galactic Tidal Interaction
Which of the following is a proposed explanation for the formation of the Milky Way's spiral arms?
Density Wave Theory
What is the name of the phenomenon where galaxies are bound together by their mutual gravitational attraction?
Galactic Clustering
Which of the following is a measure of the total luminosity emitted by a galaxy in all wavelengths of light?
Total Luminosity
What is the term for the rate at which a galaxy's rotation curve declines with increasing distance from the center?
Gradient
Which of the following is a method used to estimate the mass of a galaxy cluster based on the X-ray emission from its hot gas?
X-ray Observations
What is the name of the process by which galaxies are distributed throughout the universe in a filamentary or web-like structure?
Large-Scale Structure
Which of the following is a type of galaxy that exhibits a mixture of features from both elliptical and spiral galaxies?
Lenticular
What is the term for the group of stars that orbit a galaxy's center at roughly the same distance and in the same direction?
Stellar Orbit
Which of the following is a proposed mechanism for the formation of spiral arms in galaxies?
Density Wave Theory
What is the name of the process by which galaxies lose gas and dust due to interactions with other galaxies or environmental effects?
Galactic Stripping
Which of the following is a method used to measure the mass of a galaxy by observing the velocities of its globular clusters?
Globular Cluster Kinematics
What is the term for the spherical distribution of stars and dark matter that surrounds the central regions of a galaxy?
Galactic Halo
Which of the following is a measure of the degree of randomness in the orbits of stars within a galaxy?
Velocity Dispersion
What is the name of the relationship between the luminosity and rotation velocity of spiral galaxies, used to estimate their distances?
Tully-Fisher Relation
Which type of galaxy is characterized by a flat, rotating disk of stars, gas, and dust, along with distinct spiral arms?
Spiral
What is the term for the region in the center of a galaxy where stars are densely packed and often contains a supermassive black hole?
Galactic Nucleus
Which of the following is a method used to estimate the mass of a galaxy cluster based on the motion of its member galaxies?
Velocity Dispersion
What is the name of the process by which galaxies interact and merge with each other, leading to the formation of larger galaxies?
Galactic Cannibalism
Which of the following components of a galaxy is thought to dominate the gravitational potential in its outer regions?
Dark Matter Halo
What is the term for the distance from the center of a galaxy at which the rotation curve begins to flatten out?
Scale Radius
Which of the following is a proposed explanation for the discrepancy between observed galactic rotation curves and those predicted by Newtonian dynamics?
Dark Matter
What is the term for the apparent bending of light rays from distant objects due to the gravitational field of a galaxy?
Gravitational Lensing
Which of the following is a technique used to measure the mass of a galaxy by observing the rotation curves of stars or gas?
Kinematic Method
What is the name of the distribution of stars and interstellar matter that extends beyond the visible edge of a galaxy?
Galactic Halo
Which type of galaxy is characterized by a spheroidal shape and lacks distinct spiral arms or a disk component?
Elliptical
What is the primary source of the gravitational potential that governs the motion of stars within a galaxy?
Dark Matter
What is the term for the total mass contained within a specific radius in a galaxy, typically measured in solar masses?
Mass Profile
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