Which of the following best describes a galaxy?

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Prepare for the Praxis Elementary Education Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Ace your test!

Multiple Choice

Which of the following best describes a galaxy?

Explanation:
A galaxy is a huge, gravity-bound system that contains billions of stars, along with dust and gas. This vast collection held together by gravity is what the description in the option captures: a large cluster of stars, dust, and gas. A single star with its planets is a star system, not a galaxy. A cloud of gas with no stars is a nebula. A system of several galaxies bound together is a galaxy cluster, which is larger in scale than a single galaxy.

A galaxy is a huge, gravity-bound system that contains billions of stars, along with dust and gas. This vast collection held together by gravity is what the description in the option captures: a large cluster of stars, dust, and gas. A single star with its planets is a star system, not a galaxy. A cloud of gas with no stars is a nebula. A system of several galaxies bound together is a galaxy cluster, which is larger in scale than a single galaxy.

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