A planet's day length is influenced by its rotation speed, mass, and proximity to the Sun.
The length of a planet's day is affected by how fast it rotates. For example, Jupiter has a rotation period of 9 hours 56 minutes, giving it the shortest day among the planets. In contrast, Uranus and Neptune have longer rotation periods of about 17 hours.
Additionally, the more massive the planet, the longer its day due to the increased gravitational attraction affecting its rotation. This is evident in the gas giants like Jupiter, which have shorter days compared to the smaller terrestrial planets.
Proximity to the Sun can influence a planet's day length, but it's important to note that the day of a planet is determined by its rotation speed, not just its distance from the Sun.
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