spiral arm

nounAstronomy.

any of the elongated and curved spiral sections that are connected to the center of a spiral galaxy.

Origin of spiral arm

First recorded in 1910–15

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

That suggests FRBs originate with ordinary young stars — not the youngest, most massive stars that occupy the brightest knots in the spiral arms, but not the oldest and dimmest stars that have drifted away from their homes, either.
Some fast radio bursts come from the spiral arms of other galaxies | Lisa Grossman | June 1, 2021 | Science News
The fast radio bursts, or FRBs, come from the spiral arms of their host galaxies, researchers report in a study to appear in the Astrophysical Journal.
Some fast radio bursts come from the spiral arms of other galaxies | Lisa Grossman | June 1, 2021 | Science News
They ascertained that magnetic field lines arc both clockwise and counterclockwise along the spiral arms of the galaxy and emanate vertically from the galactic disk, twisting as they rise.
Cosmic Map of Ultrahigh-Energy Particles Points to Long-Hidden Treasures | Natalie Wolchover | April 27, 2021 | Quanta Magazine
As the Earth orbits the sun, the sun also moves, traveling around the Milky Way galaxy, carried by a spiral arm in the direction of the constellation Cygnus.
The dark matter mystery deepens with the demise of a reported detection | Tom Siegfried | March 24, 2021 | Science News
It neglects the clumping of stars into spiral arms, which the group hopes to consider in future research.
Stars are dying all across the galaxy—why don’t we see them? | Charlie Wood | December 16, 2020 | Popular-Science

Tantalus lay far out on a spiral arm, well away from the main stream of traffic that flowed through the galaxy.
Faithfully Yours | Lou Tabakow
Xanabar lays across the spiral arm, a sprawling sphere of influence vast, mighty, solid at the core.
History Repeats | George Oliver Smith

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