distance from a source of light and how long it takes to orbit that source
the time it takes to make one revolution around the sun
A planet's rotation on its axis determines the length of its day.
There is a relationship between the planets distance from the sun and the time taken for one orbit (planets year), described in Keplers third law. The square root of the time taken to orbit the sun is proportional to the cube of the average distance between the sun.
Mercury.
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 long it spins on it's axis
The time it takes for any given planet to make one complete revolution around its sun determines the length of its year.
Depends on where you are (latitude) and the time of year.
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A planet's rotation on its axis determines the length of its day.
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Usually, its mass determines its weight.
A planets year is the time it take to make one orbit of its star.
Usually the length. Sometimes, though the orientation determines which measurement is the length. Usually the length. Sometimes, though the orientation determines which measurement is the length. Usually the length. Sometimes, though the orientation determines which measurement is the length. Usually the length. Sometimes, though the orientation determines which measurement is the length.
84 known moons and planets
The time it takes to go around its solar systems sun.
The planets are not all the same distance from the Sun, which determines how far they have to travel, and how fast they are moving. Planets farther from the Sun have much longer orbits and are not moving as quickly. So their period of revolution (year) is longer.
Typically, this length of time is called a "year". Each planet's year is a different length than that of the other planets and increases as the planet is further from the Sun.