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
It is now very clear that we live some 30,000 light-years from the galactic core, on the fringes of a spiral arm, where the local density of stars is relatively sparse.
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.
