the world's axis is the run line that runs between the sky’s three brightest stars of all: canopus and sirius in the south and lyra in the north, creating the central line’s course longitudinally through the milky way.

How would the previous sentence be correctly capitalized?
The world's axis is the run line that runs between the sky’s three brightest stars of all: Canopus and Sirius in the south and Lyra in the north, creating the central line’s course longitudinally through the Milky Way.