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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.

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Q: What planet's length of a day is nine hours?
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Related questions

What planets length of the day is 9 hours?

Mercury.


What is the planets length on the day?

23 Hours 57 Minutes and 14 Seconds


Which two planets have the closest length of day?

Earth and Mars. Earth's day is 24 hours, while Mars' day is 24 hours 37 minutes.


Which two planets have the same length of day which is shorter than an earth day?

The two planets that have the same length of and Earth day but shorter than a Earth day are Neptune and Uranus because a Earth day on Neptune is 18 hours and 30 minuets Earth time, And Uranus is 17.24 hours. Thus Neptune and Uranus is closest to an Earth day being below 23 hours and 56 min (24 hours rounding).


What is the length of each of the planets days?

1 day on Mercury is 4222.6 hours. Little more than 3246 hours (middle of 14 days.


What planets length of a day is 9 hours?

mac and cheese and pop is good. i hope you take my answer as a valuble life statement. have a nice day. thank you:)


What would happen to the length of the day if the length of the day took 40 hours?

If a day took 40 hours, then a day would take 40 hours.


How long is a day on this planets?

24 hours


What would you define the length of a planets day?

by the rotation of the planet


What is the length of day on earth?

the length of day on earth is 24 hours


What is the length of day on Jupiter?

the length of a day on Jupiter is average, 9.9 hours


Length of a day on Venus?

See answer given for length of Venus day in hours.