spiral arm
Americannoun
Etymology
Origin of spiral arm
First recorded in 1910–15
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It also could hold clues to why the Milky Way has its spiral arm.
From Salon • Nov. 21, 2023
This discovery also connects spiral arm instabilities to the episodic growth bursts - a key factor for how high-mass stars form.
From Space Scoop • Mar. 29, 2023
But that usually requires the supermassive black hole in the center of a galaxy, and the Cow is situated in its galaxy’s spiral arm.
From Science Magazine • Jan. 11, 2019
The Sun is located in the Orion Spur, which is a minor spiral arm located between two other arms.
From Textbooks • Oct. 13, 2016
Occasionally a spiral arm may be produced by the close gravitational encounter of two galaxies, each of course composed of billions of stars.
From "Cosmos" by Carl Sagan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
