Which celestial body has a longer day than a year?

Venus is the correct choice because it has a unique rotational period compared to its orbital period around the Sun. A day on Venus, defined as the time it takes for the planet to complete one rotation on its axis, lasts about 243 Earth days. In contrast, a year on Venus, which is the time it takes to orbit the Sun, is only about 225 Earth days. This means that a single day on Venus is longer than a full year.

The other celestial bodies have day lengths that are shorter than or similar to their year lengths. For example, Earth has a day length of approximately 24 hours and a year of about 365 days. Mars has a day that lasts about 24.6 hours, and its year is about 687 Earth days. Jupiter spins very quickly, with a day lasting just about 10 hours, while its year is around 12 Earth years. Therefore, Venus uniquely stands out with its longer day than year ratio.