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The length of a planets "day" is another way of saying the amount of time it takes a planet to rotate once on it's axis. Each planet does this in it's own good time. There are some basic principles behind it, but overall, there is no "one answer" we can pinpoint as to why planets rotate at different speeds. They simply do.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoBecause some planets take longer to do a full rotation (spin round).
Edit: More accurately, the magnetic field surrounding them and the sun differs based on distance. Mercury, the planet closest to the sun, has a day of some 12 hours. Pluto, the farthest, has a day of over 200 Earth years.
Wiki User
∙ 15y agoBecause they turn faster on their axis than the Earth does.
All planets spin at different speeds, related to their mass.
Wiki User
∙ 14y agoNot all planets rotate around their axis at the same rate. The slower the rotation, the longer their day.
Wiki User
∙ 14y agoBecause the nearer the sun they are, the shorter the light is around
Wiki User
∙ 13y agoSome planets have longer/shorter days because they are further away from the sun so they have more or less time to orbit around it.
Wiki User
∙ 11y agoBecause they all rotate and there is nothing to make them all rotate at the same speed. The rotation speeds are all more or less random.
Wiki User
∙ 13y agoIt depends on how fast the axis rotates
Wiki User
∙ 11y agobecause your mom is stupid
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Which outer planets have periods of rotation shorter than earth?
All of them!
What is the difference between planets that rotations time are shorter than earth to planets rotation time that are longer than earth?
The outer planets all rotate faster than the inner planets. Each of them has a rotational period shorter than an Earth day. All of the inner planets have rotational periods longer than one Earth day. The outer planets are mostly made up of hydrogen, helim, and ice, and they are much larger than the inner planets which are mostly iron and various types of rock.
What outer planets have days Longer than 24hrs?
None of the four outer planets, they all have rotational periods shorter than 24 hours. The dwarf planet Pluto has a rotational period of 6.4 days though.
Which planets have longer and shorter years than earth?
Planets closer to the sun than Earth orbit the sun in less than one year (Mercury and Venus), while planets further out from the sun than Earth take longer than a year (Mars, Jupiter, Saturn, Uranus and Neptune). The further out you go, the longer it takes to orbit the sun.
Why are days on Jupiter shorter than the days on Earth?
That's because Jupiter rotates much more quickly than Earth. (Astronomers aren't sure exactly why that happens.)
How many planets have a shorter day than earth?
2
What is the effect of the fast rotation of earth on its axis?
The earth spins faster than the planets Mercury and Venus, meaning that its apparent days are shorter (24 hours).
Which outer planets have periods of rotation shorter than earth?
All of them!
How many days shorter is one year on mercury than one year on earth?
177 days shorter on mercury than the earth
Which have shorter days than earth?
pluto
Would a mercury year be longer or shorter than a earth year?
Shorter. Mercury has a shorter orbit than earth and 1 day in mercury = 59 days on Earth. 1 year on mercury= 88 days on earth.
What is the difference between planets that rotations time are shorter than earth to planets rotation time that are longer than earth?
The outer planets all rotate faster than the inner planets. Each of them has a rotational period shorter than an Earth day. All of the inner planets have rotational periods longer than one Earth day. The outer planets are mostly made up of hydrogen, helim, and ice, and they are much larger than the inner planets which are mostly iron and various types of rock.
How does a year on earth differ with other planets?
A year on Earth is longer than it is on two other planets, and shorter than it is on the remaining five. The farther a planet is from the sun, the longer its year is.
How many days shorter does Venus' have?
Earth rotates faster than Venus by about 141 days.
Are inner planets large or small?
The inner, or Terrestrial planets are very small in comparison to the outer, or Jovian planets. The smallest Jovian planet, Uranus, is 14.5 times larger than the largest Terrestrial planet, Earth.
Is a year on mars shorter than earth?
No. A year on Earth is 365 1/4 days, while on Mars a year is 687 Earth days.
What outer planets have days Longer than 24hrs?
None of the four outer planets, they all have rotational periods shorter than 24 hours. The dwarf planet Pluto has a rotational period of 6.4 days though.
