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megaparsec

American  
[meg-uh-pahr-sek] / ˈmɛg əˌpɑr sɛk /

noun

Astronomy.
  1. one million parsecs.


megaparsec Scientific  
/ mĕgə-pär′sĕk /
  1. One million parsecs.


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.

That mpc is what's known as a megaparsec, roughly 3,260,000 light years.

From Salon • Dec. 9, 2024

The universe is still expanding, at a rate of 73 kilometers per second per megaparsec, a metric known as Hubble's constant.

From Salon • Feb. 2, 2023

In their analysis, H0 comes out to be 73.04 ± 1.04 kilometers per second per megaparsec.

From Scientific American • Apr. 18, 2022

We determine the Hubble constant to be about 70 kilometres per second per megaparsec.

From Nature • Oct. 15, 2017

Thus when astronomers refer to a Hubble constant of 50, what they really mean is "50 kilometers per second per megaparsec."

From "A Short History of Nearly Everything" by Bill Bryson