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Definition Day:
One Earth Day is 24 hours or 86,400 seconds.
That is a legal and standardized definition.
It turns out there are several others which are needed to be sure of the answer of this question.
Astronomical Day:
If someone asks how long one day is, then the answer depends on whether one defines the day according to how long it takes the Sun to return to its position in the sky or whether it refers to how long the stars take to return to their apparent position in the sky. Normally, the question refers to the Solar day.
1. Solar Day: A mean solar day is about 86,400.002 SI seconds.
Originally, a day and the definition of hours and seconds was defined according to the solar day. The solar day is the time it takes the sun to go from its noon position in the sky to the same position again. That actually changes by a few seconds during the course of a year. Over a year, year to year, it averages to nearly the exact same time and at the moment it averages 2 thousandths of a second longer than it did when they made the original definition.
2. Rotation Period (also called the stellar day or the similar idea, the sidereal day):
The rotation period is the time it takes for the planet to complete one rotation relative to the fixed stars (not relative to the Sun). For Earth the rotation period is 0.99726968 days or 23 hours 56 minutes and 4.100 seconds. For Earth (the stellar day and the sidereal day are nearly of the same) this is about 3 minutes 56 seconds shorter than the solar day. As a consequence, the Earth rotates about 366 times a year.
Wiki User
∙ 11y ago
Wiki User
∙ 12y ago23 hours, 56minutes and 4.091 seconds. This is the rotational period relative to the background stars, slightly short of the 24 hour apparent day. This is due to the time difference caused by Earths progression around the sun in that time.
Wiki User
∙ 12y agoThe length of day on a planet is determined by its rate of rotation. Hence it is different for each planet. Jupiter has the shortest day, it is only 10 hours long.
Wiki User
∙ 12y agoThe actual length of a day is 23 hours, 56 minutes and 4.09 seconds
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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.
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).
Length of the Moon's day?
29.5 earth days is one moon day wich is the length of the moons day
Do all planets turn?
All planets turn on their axis. This is called the planet's rotation; one complete rotation is equal to one day on that planet.
The length of a day is based on?
The length of a day is based on the average period of time required for one rotation of the earth on its axis.Read more: The_length_of_a_day_is_based_on
What planets length of the day is 9 hours?
Mercury.
What would you define the length of a planets day?
by the rotation of the planet
Why does the length of day vary from one planet to another?
Because different planets have different diameters and spin at different rates.
What is the suns length of day?
I think that the sun doesn't have any length of day, because of the heat and how the planets revolve around the sun.
What two planets have similar length of day?
Earth has a 24 hour day and Mars has a 25 hour day.
What is the planets length on the day?
23 Hours 57 Minutes and 14 Seconds
What is the difference of The rotational period of the inner and outer planets?
Rotational time of the planets is random (the length of the planet's day), but the outer planets do spin faster than the inner planets.
How does the earth's movements determine how long our days are?
One full rotation of any planet on its axis is the length of that planets day, Earth included.
Do any planets have longer days or years?
No two planets in our solar system have the same length of day or length of year. Compared with Earth, these planets have longer years: Mars, Jupiter, Saturn, Uranus, Neptune. These have much longer days than Earth: Mercury and Venus. Mars has a day that's slightly longer than Earth's day. Depending on the particular definition of "day" that is used, two planets have a day that's longer than than that planet's year. They are Mercury (solar day) and Venus (sidereal day).
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.
Why does the length of a day and year vary from planet to planet?
Some planets rotate faster or than others. Also the planets take different times to orbit the Sun.
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.
