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
Forget about writing a tower of powers that stretches out for miles or megaparsecs.
—
Ben Brubaker, Quanta Magazine, 22 Aug. 2025
Planck mission scientists arrived at a Hubble constant of 67.5 plus or minus 0.5 kilometers per second per megaparsec.
—Ashley Strickland, CNN, 23 May 2022
Hubble’s data shows that the universe’s expansion rate is around 73 kilometers per second per megaparsec.
—Joshua Hawkins, BGR, 20 May 2022
In their analysis, H0 comes out to be 73.04 ± 1.04 kilometers per second per megaparsec.
—Anil Ananthaswamy, Scientific American, 18 Apr. 2022
Under certain assumptions about the fundamental nature of the universe, Planck data suggest that the Hubble constant should have a value of 67.4 kilometers a second per megaparsec, give or take 0.5.
—Michael Greshko, National Geographic, 12 Sep. 2019
Previous measurements of universal expansion were split between either 67 or 72 kilometers per second per megaparsec.
—Nathaniel Scharping, Discover Magazine, 16 Oct. 2017
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Ben Brubaker, Quanta Magazine, 22 Aug. 2025
Planck mission scientists arrived at a Hubble constant of 67.5 plus or minus 0.5 kilometers per second per megaparsec.
—Ashley Strickland, CNN, 23 May 2022
Hubble’s data shows that the universe’s expansion rate is around 73 kilometers per second per megaparsec.
—Joshua Hawkins, BGR, 20 May 2022
In their analysis, H0 comes out to be 73.04 ± 1.04 kilometers per second per megaparsec.
—Anil Ananthaswamy, Scientific American, 18 Apr. 2022
Under certain assumptions about the fundamental nature of the universe, Planck data suggest that the Hubble constant should have a value of 67.4 kilometers a second per megaparsec, give or take 0.5.
—Michael Greshko, National Geographic, 12 Sep. 2019
Previous measurements of universal expansion were split between either 67 or 72 kilometers per second per megaparsec.
—Nathaniel Scharping, Discover Magazine, 16 Oct. 2017
Cite this Entry
“Megaparsec.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/megaparsec. Accessed 18 Sep. 2025.
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