The planet known for its significant axial tilt and extreme seasonal variations is Uranus. Its tilt is about 98 degrees, causing it to rotate nearly on its side. This unusual tilt results in extreme differences in temperatures and daylight hours during its long seasons, each lasting about 21 Earth years. For instance, one pole may experience constant sunlight while the other is shrouded in darkness for years. The exploration of Uranus and its unique rotational characteristics has provided valuable insights into planetary formation and dynamics. Its unusual features continue to intrigue astronomers and planetary scientists.