galaxies are located millions of light years from earth
world is in_orbit_about_sun. stars is millions_of_light_years_away. milky_way_galaxy is galaxy. andromeda_galaxy is over_2.2_million_light_years_away. milky_way is galaxy. light is where_no_darkness. earth is billions_of_years_old. nearest_star is four_light_years_from_earth. universe has sun_and_earth light_year is astronomy_unit.