Conversation so far:
Describe Uranus.
Uranus (from the Latin name Ūranus for the Greek god Οὐρανός) is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System.
What makes Uranus so unusual?
Unlike the other planets of the solar system, Uranus is tilted so far that it essentially orbits the sun on its side, with the axis of its spin nearly pointing at the star.
Tell me about Uranus's orbit.
Uranus orbits the Sun once every 84 years, taking an average of seven years to pass through each constellation of the zodiac. In 2033, the planet will have made its third complete orbit around the Sun since being discovered in 1781.

Question: Why is it tilted?
Self-contained rewrite: Why is Uranus tilted?