The planet known for its tilted axis is Uranus. It has an axial tilt of about 98 degrees, which is extreme compared to other planets in our solar system. This unique tilt causes Uranus to rotate on its side, so its poles are almost in the plane of its orbit around the Sun. This results in unusual seasonal changes, with one hemisphere experiencing prolonged daylight while the other remains in darkness for extended periods. Uranus is classified as an ice giant, composed mostly of water, ammonia, and methane ice, and it is also known for its striking blue color caused by methane in its atmosphere.