megaparsec

noun

mega·​par·​sec ˌme-gə-ˈpär-ˌsek 

: a unit of measure for distances in intergalactic space equal to one million parsecs

Examples of megaparsec in a Sentence

Recent Examples on the Web

So a galaxy that’s, say, 10 megaparsecs away from us is receding at about 700 km/sec. — Phil Plait, Scientific American, 6 Feb. 2026

Forget about writing a tower of powers that stretches out for miles or megaparsecs. — Ben Brubaker, Quanta Magazine, 22 Aug. 2025

Hubble’s data shows that the universe’s expansion rate is around 73 kilometers per second per megaparsec. — Joshua Hawkins, BGR, 20 May 2022

Previous measurements of universal expansion were split between either 67 or 72 kilometers per second per megaparsec. — Nathaniel Scharping, Discover Magazine, 16 Oct. 2017

Word History

Etymology

mega- + parsec

First Known Use

1920, in the meaning defined above

Rhymes for megaparsec

• aztec
• breakneck
• codec
• exec
• mixtec
• paycheck
• pinchbeck
• recheck
• redneck
• toltec
• beck
• breck