Spiral Arm

Pronunciation: /ˈspaɪrəl ɑːrm/

Definitions of spiral arm

noun a long, winding curve or line that resembles a spiral shape, often used to describe the structure of galaxies

Example Sentences

A1 The Milky Way galaxy has several spiral arms.

A2 Scientists study the formation of stars in spiral arms.

B1 Astronomers believe that our solar system is located in one of the Milky Way's spiral arms.

B2 The spiral arm of a galaxy contains a higher density of stars and gas compared to the space between arms.

C1 The spiral arm structure of galaxies is influenced by gravitational interactions with neighboring galaxies.

C2 Recent studies suggest that the spiral arms of galaxies may be temporary features that come and go over time.

Examples of spiral arm in a Sentence

formal The Milky Way galaxy is made up of several spiral arms.

informal I read that the Milky Way has these cool spiral arms.

slang I love how the Milky Way looks with its spiral arms.

figurative Her thoughts were swirling around her mind like a spiral arm.

Grammatical Forms of spiral arm

• plural: spiral arms
• comparative: more spiral
• superlative: most spiral
• present tense: spiral arm
• future tense: will spiral arm
• perfect tense: has spiraled arm
• continuous tense: is spiraling arm
• singular: spiral arm
• positive degree: spiral arm
• infinitive: to spiral arm
• gerund: spiraling arm
• participle: spiraled arm

Origin and Evolution of spiral arm

First Known Use: 1920 year

Language of Origin: English

Story behind the word: The term 'spiral arm' originated from the study of spiral galaxies, which have arms that spiral out from the center of the galaxy.

Evolution of the word: The term 'spiral arm' has been consistently used in astronomy to describe the structure of spiral galaxies since its first known use in 1920. It has become a standard term in the field and is widely understood by astronomers and the general public alike.