What causes the length of a year on a planet?

Answer 1

The length of a year, for any planet, is the amount of time that it takes for that planet to complete one orbit of the sun. That, in turn, depends only upon the distance of that planet from the sun. The closer the planet is to the sun, the shorter the year. The farther the planet is from the sun, the longer the year. It takes a certain amount of orbital speed to counteract the gravitational attraction of the sun. And similarly, if a planet is moving faster in its orbit, there will be correspondingly more centrifugal force, causing the planet to move farther from the sun. Orbital mechanics makes it all work out.

Answer 2

The time it takes for the Earth to spin on its rotational axis, is responsible for how much time each day, the Earth faces the sun.And how much time each day the Earth faces away from the sun.

Answer 3

The length of time it takes to make a complete orbit around the sun.

Answer 4

Three hundred and sixty five days plus six hours and 366 days a leap year..

Answer 5

A year is 1 revolution of the earth around the sun, the distance from the sun and the size of that orbit is responsible for the length of the year

Answer 6

The time taken for Earth to orbit once around the sun.

Answer 7

The amount of time it takes for a planet to make one orbit around the sun.