Venus is the planet with a day that is longer than its year. A day on Venus, defined as one complete rotation on its axis, takes about 243 Earth days, while its year, or relative time taken to orbit the Sun, is approximately 225 Earth days. This peculiar rotation also means that a solar day, from one sunrise to the next, lasts about 117 Earth days due to its slow spinning and retrograde rotation, where it rotates in the opposite direction of its orbit. The unique relationship of Venus' rotation and orbit makes it an interesting subject of study in planetary science.