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There are two main definitions of "day" for a planet:
1) Sidereal day. That's the time taken to rotate once.
2) Solar day. That's the time taken for the Sun to complete one apparent journey
around the sky. Usually it's given as the "mean solar day", which is the average value.
The solar day depends on the planet's orbital motion, as well as its rotation.
Here are the details, with slight approximations:
Mercury : sidereal day, 58.65 Earth days
solar day, 175.94 Earth days
Venus: sidereal day, 243.02 Earth days
solar day, 116.75 Earth days
Earth: sidereal day, 23.934 hours
solar day, 24.000 hours
Mars: sidereal day, 24.623 hours
solar day, 24.660 hours
For these planets both days are nearly the same length:
Jupiter: 9.92 hours
Saturn: 10.66 hours
Uranus: 17.24 hours
Neptune: 16.11 hours
What else can I help you with?
What planet length in day is close to the length of earths day?
Mars.
What is the relationship between the length of a planet's day and the rate of planet's rotation?
The length of a planet's day is directly related to its rate of rotation on its axis. A faster rate of rotation results in a shorter day, while a slower rate of rotation leads to a longer day. This relationship is determined by the planet's mass and distribution of mass.
What movement of the planet makes one day as a unit of time?
It is the rotation of the planet one complete revolution that determines the length of a day.
Is this true or false the length of a planet's year is determined by how fast it spins?
False, the speed it spins on it's axis determinds the length of day. The speed it rotates the sun determinds the length of it's year.
What determines the length of day on a planet?
How long it spins on it's axis
What planet length in day is close to the length of earths day?
Mars.
What planet's length of its day is close to the length of Earth's day?
Mars
Does each planet have the same length of day?
No
What is it called when a planet complete spin on its axis?
A planet completing one full rotation on its axis is called a "day." This is what determines the length of a day on that planet.
Why does the length of the day and night vary from planet to planet?
Because of the difference in speed of rotation of each planet.
How does the planets distance from the sun affect the length of a day?
Not at all. The planet's daily rotation is independent of its distance from the Sun.
What is the relationship between the length of a planet's day and the rate of planet's rotation?
The length of a planet's day is directly related to its rate of rotation on its axis. A faster rate of rotation results in a shorter day, while a slower rate of rotation leads to a longer day. This relationship is determined by the planet's mass and distribution of mass.
What would you define the length of a planets day?
by the rotation of the planet
What movement of the planet makes one day as a unit of time?
It is the rotation of the planet one complete revolution that determines the length of a day.
Is this true or false the length of a planet's year is determined by how fast it spins?
False, the speed it spins on it's axis determinds the length of day. The speed it rotates the sun determinds the length of it's year.
What is the length of day for earth?
er..24 hours... what planet do you live on?
Which planet has a day almost the same length of time as earth?
mars
