Questions and Answers
What is a black hole?
What describes an elliptical galaxy?
What is a galaxy?
A large-scale collection of stars, dust, and gas held together by gravity
What defines an irregular galaxy?
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What is the shape of a spiral galaxy?
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What does a galaxy include? (Choose all that apply)
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A galaxy whose stars are symmetrically dispersed in a spherical or flattened shape is _____ galaxy.
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The Milky Way is _____ galaxy.
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A galaxy whose stars are arranged in a disk with arms that surround a central bulge is _____ galaxy.
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What are the basic shapes into which astronomers classify most galaxies?
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The most common shape for a galaxy is ______.
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The Milky Way is located in the _____ Group.
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A galaxy cluster contains between _____ galaxies.
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The Milky Way is apparently on a course to collide with Andromeda at some point in the distant future.
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Study Notes
Black Holes
- Defined as regions in space with such dense matter that light cannot escape.
Types of Galaxies
- Elliptical Galaxy: Stars are symmetrically arranged in spherical or elongated shapes.
- Irregular Galaxy: Formed by the collision of other galaxies, lacking a defined shape.
- Spiral Galaxy: Characterized by a central bulge, a flattened disk, and curving arms.
General Concepts
- A galaxy is a vast assembly of stars, dust, and gas maintained together by gravitational forces.
- Key components of a galaxy include planets, stars, dust, interstellar gas, and dark matter.
Milky Way and Galaxy Classification
- The Milky Way is classified as a barred spiral galaxy.
- Astronomers categorize most galaxies into three basic shapes: irregular, elliptical, and spiral.
- The most prevalent galaxy shape identified is spiral.
- The Milky Way resides in the Local Group of galaxies.
Galaxy Clusters
- A galaxy cluster typically contains between 50 to 1,000 individual galaxies.
Future Collision
- The Milky Way is on a projected collision course with the Andromeda galaxy in the distant future.
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Description
Test your knowledge of galaxies with these flashcards. This quiz includes key terms such as black holes and different types of galaxies, providing definitions to help reinforce your understanding. Perfect for students and astronomy enthusiasts alike!
