Report - Lecture 1 - IIHEcdeclerc/astroparticles/2012-13/...• Lightyear = Ly = 0.946 x 1016 m • 1 year = 31.5 106 s • parsec = pc = 3.3 Ly3.3 Ly • Mpc = 3.3 MLy • Radius Milky Way

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