None of them.
The nearest planet to have a day-length of 9 hours is Jupiter, on which days last 9 hours and 56 minutes precisely. Under 10 hours.
Mercury.
Earth and Mars. Earth's day is 24 hours, while Mars' day is 24 hours 37 minutes.
It's about 17 hours and 14 minutes long. (Incidentally, for the outer planets there's very little difference between the lengths of the sidereal days and the solar days.)
24 hours
There is no direct relationship between the rotation of a planet (which governs day length) and a planets distance from the sun. The nature of the planets spin is more to do with the formation of the system early on, by large impacts of the more numerous bodies that would have been around.
Mercury.
23 Hours 57 Minutes and 14 Seconds
Earth and Mars. Earth's day is 24 hours, while Mars' day is 24 hours 37 minutes.
Gas planets typically rotate faster than Earth. For example, Jupiter rotates the quickest with a day length of about 10 hours, Saturn has a day length of about 10.7 hours, Uranus about 17 hours, and Neptune about 16 hours. In comparison, Earth rotates once every 24 hours.
1 day on Mercury is 4222.6 hours. Little more than 3246 hours (middle of 14 days.
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It's about 17 hours and 14 minutes long. (Incidentally, for the outer planets there's very little difference between the lengths of the sidereal days and the solar days.)
If a day took 40 hours, then a day would take 40 hours.
24 hours
the length of day on earth is 24 hours
There is no direct relationship between the rotation of a planet (which governs day length) and a planets distance from the sun. The nature of the planets spin is more to do with the formation of the system early on, by large impacts of the more numerous bodies that would have been around.
by the rotation of the planet