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It is based upon the way a day is defined on Earth.
It is: either 1) the amount of time that it takes the planet to make one full rotation on its axis. That's a "sidereal day".
or 2) the (average) time between successive culminations (highest point reached above the horizon) of the Sun in the sky. That's the "solar day".
For most planets there's not much difference. However, for Mercury and Venus the difference is huge.
What else can I help you with?
What country has day and night both?
Every country on Earth experiences day and night due to the rotation of the planet on its axis. The length of day and night varies depending on the time of year and the location on Earth.
What is determined by the earth's revolution and angle of tilt?
The Earth's revolution around the Sun determines the length of the year and the changing seasons. The angle of tilt (23.5 degrees) causes different parts of the Earth to receive varying amounts of sunlight, leading to the seasonal changes.
What will happen to day length if polar ice melt?
If polar ice melts, the day length will not be directly affected because day length is determined by the Earth's rotation on its axis, not the presence of ice at the poles. However, melting ice can contribute to rising sea levels and changes in the Earth's climate, which can have broader impacts on the environment and ecosystems.
What determines the first day of spring?
The first day of spring is determined by the vernal equinox, which occurs around March 20th in the Northern Hemisphere. This is when day and night are approximately equal in length, and it marks the beginning of spring.
What determines the lenght of night on earth?
The length of night on Earth is determined by the rotation of the Earth on its axis. As the Earth rotates, different parts of the planet are either facing towards the Sun (daytime) or away from the Sun (nighttime). The tilt of the Earth's axis also plays a role in the length of night at different times of the year.
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 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.
If the entire population of world moved to antarctica would it affect th length of day if so how?
It would have zero effect.The length of a day is determined by one's location on the planet.
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
What is the relationship between earth day length and the distance from the sun?
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.
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 are the length of the day and year related to Earth's movement through space?
WELL THE LENGTH OF THE DAY IS RELATED TO THE Rotation AND REVOLUTION OF THE PLANET BECAUSE THE PLANET HAS LENGTH BUT IT MIGHT NOT HAVE THE SAME THING AS OUR LENGTH AND IT HAS THE SAME ROTATION AND REVOLUTION.WHAT DO YOU YOUNG GUYS AND LADIES THINK ABOUT MY ANSWER ?PLEASE COMMENT ON IT I WILL APPROACHED THAT BY.
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.
