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.
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
From our position out on a spiral arm of the Galaxy, we see both inwards towards the centre of the Galaxy and outwards towards its edge.
From The Guardian • Jun. 10, 2016
On the average, the Sun and the planets spend forty million years in a spiral arm, eighty million outside, another forty million in, and so on.
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.
