Uranus's south pole was pointed almost directly at the Sun at the time of Voyager 2's flyby in 1986. The labeling of this pole as "south" uses the definition currently encouraged by the International Astronomical Union, namely that the north pole of a planet or satellite should be the pole which points above the invariable plane of the solar system, regardless of the direction the planet is spinning. However, a different convention is sometimes used, in which a planet's north and south poles are defined according to the right-hand rule in relation to the direction of rotation. In terms of this coordinate system it was Uranus's north pole which was in sunlight in 1986.x_SOninja_x wrote:I'm confused about uranus
how do we know which pole is north or south?
But I think the north is facing the sun now, since they had an equinox in December 2007.