spiral galaxy

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Explanation of "Spiral Galaxy"

Definition:
A "spiral galaxy" is a type of galaxy that has a spiral shape. In a spiral galaxy, there are long arms that curve out from the center, where older stars are found. The arms contain younger stars and often look like a pinwheel or whirlpool.

Advanced Usage

In more advanced discussions, you might encounter terms like "Hubble Classification," which categorizes galaxies, including spiral galaxies. You might also talk about "barred spiral galaxies," which have a bar-shaped structure in the center.

Word Variants

• Spiral (adjective): Related to the spiral shape itself (e.g., "the spiral arms of the galaxy").
• Galaxy (noun): A large system of stars, gas, and dust held together by gravity.

Different Meanings

• Spiral (noun): Can also refer to a shape that winds around a central point, like a spiral staircase or curly hair.
• Galaxy (noun): In a broader sense, it can also refer to a large group of famous people or things (e.g., "a galaxy of stars in the movie").

Synonyms

• Spiral System: Sometimes used interchangeably, but less common.
• Rotating Galaxy: Describes the movement of the stars in a spiral galaxy.

Idioms and Phrasal Verbs

While there aren't specific idioms or phrasal verbs directly related to "spiral galaxy," you might hear phrases like: - "Spiraling out of control": This means something is becoming chaotic or difficult to manage. It uses the concept of spiraling as it relates to movement.

Summary

A "spiral galaxy" is a beautiful and fascinating structure in space, showcasing the arrangement of stars and their formation.

Academic

Noun

1. a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center

Synonyms

• spiral nebula