What is a galaxy?
Galaxies

Flashcard
•
Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A galaxy is a massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.
2.
FLASHCARD QUESTION
Front
What are the three main types of galaxies?
Back
The three main types of galaxies are spiral, elliptical, and irregular.
3.
FLASHCARD QUESTION
Front
What type of galaxy is the Milky Way?
Back
The Milky Way is a spiral galaxy.
4.
FLASHCARD QUESTION
Front
What is a light year?
Back
A light year is the distance that light travels in one year, approximately 5.88 trillion miles (9.46 trillion kilometers).
5.
FLASHCARD QUESTION
Front
What characterizes a spiral galaxy?
Back
A spiral galaxy is characterized by its flat, rotating disk containing stars, gas, and dust, and a central concentration of stars known as the bulge.
6.
FLASHCARD QUESTION
Front
What is an elliptical galaxy?
Back
An elliptical galaxy is a type of galaxy that has an ellipsoidal shape and lacks the distinct features of spiral galaxies, often containing older stars.
7.
FLASHCARD QUESTION
Front
What is an irregular galaxy?
Back
An irregular galaxy is a galaxy that does not have a distinct regular shape, often resulting from gravitational interactions with other galaxies.
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