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Galaxies are not so far from each other compared to their sizes as you might think. The typical distance between galaxies is a few Mpc (1 Mpc, or megaparsec, is roughly 3 million light-years). While the stellar disk of a galaxy like the Milky is only $\sim30\,\mathrm{kpc}$ across, its virial radius — determined primarily by its dark matter halo — is larger ...


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This oscillation is very negligible. The amplitude of oscillation on galactic place is 105light years at Max. Whereas sun make nearly 3 such oscillations in one galactic rotation in a period of 240 Million LY. This means that in travelling 40 MLY on galactic plane, sun reaches the amplitude max. So if you calculate the angle which the sinusoidal path makes ...


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