You can view either a map of the earth showing the day and night regions at this moment or view the earth from the Sun or moon.
(You; can view; either a map of the earth showing the day and night regions at this moment or view the earth from the Sun or moon) (either a map of the earth; showing; the day and night regions; T:at this moment)
You either a map of the earth
can view showing
either a map of the earth showing the day and night regions at this moment or view the earth from the Sun or moon
the day and night regions T:at this moment