remain in the sky for 21 years. If you were standing at the equator, the Sun would hug the northern horizon during this entire time. Then the south pole faces the Sun for 21 years and the north pole gets no light. Between the periods when the north pole and the south pole face the Sun, the equatorial regions of Uranus are lined up with the Sun. During these two 21-year periods, the planet experiences both night and day as it rotates.
