Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: megaparsec
  1. (cosmology) one million parsecs; 3.08568 x 10^22m or 3.262 million light years, roughly the distance from the Milky Way to the nearest galaxy (0.77Mpc to Andromeda)
    - Mpc

Derived forms: megaparsecs

Encyclopedia: Megaparsec