spiral arm
English
Noun
spiral arm (plural spiral arms)
- (astronomy) A section of a spiral galaxy that coils out from the centre.
- 1979, Douglas Adams, The Hitchhiker's Guide to the Galaxy
- Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun.
- 2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →ISBN, OCLC 246633669, PC, scene: Mass Relays Codex entry:
- Primary mass relays can propel ships thousands of light years, often from one spiral arm of the galaxy to another.
- 1979, Douglas Adams, The Hitchhiker's Guide to the Galaxy