How does the distance from the sun affect the length of a year?

Answer 1

Distance from the sun affects the length of the year in that the farther a planet is from the sun, the longer it takes to make one complete revolution of the sun. That makes planets farther out from the sun have longer years. The year is thought of on earth as the length of time it takes the earth to make a "lap" around the sun, and each other planet can have its own unique year just like earth. The gravity of the sun (and, to a much, much lesser extent the gravity of the planets) keeps orbiting bodies in orbit. And planets closer to the sun are pulled on much harder by the sun's gravity and must, therefore, move more quickly in their orbits to avoid being pulled into the sun. That translates into higher orbital speeds for planets closer in and shorter times for them to make a "lap" around the sun. The closer to the sun a planet is, the shorter its year. The farther out it is, the longer its year.

Answer 2

Its all to do with Kepler's laws of planetary motion. There is an equation (see his thrid law) that states that with a further distance out from the centre of a solar system, the effect of gravity is less and so the rotational period (an speed) is slower. The planets will orbit the sun at slower speeds as you move further out from the sun, and they will also have a longer journey.

Answer 3

A year is defined as the time it takes for a planet to revolve around the Sun. So the farthest the planet is from the Sun, the longest the years are there. Years in Mercury are very short compared to ours, and years in Neptune or Pluto are much longer.

Answer 4

A planetary year is the length of time a planet takes to make one complete rotation around the sun. The further the planet is from the sun, the larger the orbital distance, and therefore, the longer it takes.

Answer 5

Because the distance they have to travel is greater. See related questions for more information.

Answer 6

the length of the year increases as it takes a longer time to revolve around the sun

Answer 7

The further away you are from the sun, the longer the year would be for us. But thats only if we continue at the same orbit speed. If its faster the year could be faster or similar.

Answer 8

because the planets have longer to go :)

Answer 9

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