The Short Answer:
here is how long it takes each of the planets in our solar system to orbit around the Sun ( in Earth days ) :
Mercury : 88 days
Venus : 225 days
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Earth : 365 days
Mars : 687 days
Jupiter : 4,333 days
Saturn : 10,759 days
Uranus : 30,687 days
Neptune : 60,190 days
A year on Earth is approximately 365 days. Why is that considered a year ? Well, 365 days is about how long it takes for ground to orbit all the manner around the Sun one time .
It ’ s not precisely this bare though. An earth class is actually about 365 days, plus approximately 6 hours. Read more about that here .
All of the other planets in our solar system besides orbit the Sun. sol, how long is a year on those planets ? well, it depends on where they are orbiting !
Planets that orbit closer to the Sun than Earth have shorter years than ground. Planets that orbit far from the Sun than Earth have longer years than earth .
This happens for two main reasons.
- If a planet is close to the Sun, the distance it orbits around the Sun is fairly short. This distance is called an orbital path.
- The closer a planet travels to the Sun, the more the Sun’s gravity can pull on the planet. The stronger the pull of the Sun’s gravity, the faster the planet orbits.
Check out how long a year is on each planet below !
year : 88 Earth Days
Distance from Sun : ~35 million miles
( 58 million kilometer )
year : 225 Earth Days
Distance from Sun : ~67 million miles
( 108 million kilometer )
year : 365 Earth Days
Distance from Sun : ~93 million miles
( 150 million kilometer )
year : 687 Earth Days
Distance from Sun : ~142 million miles
( 228 million kilometer )
class : 4,333 Earth Days
Distance from Sun : ~484 million miles
( 778 million kilometer )
year : 10,759 Earth Days
Distance from Sun : ~887 million miles
( 1.43 billion km )
year : 30,687 Earth Days
Distance from Sun : ~1.78 billion miles
( 2.87 billion km )
year : 60,190 Earth Days
Distance from Sun : ~2.80 billion miles
( 4.5 billion km )
Why does NASA care about years on other planets?
NASA needs to know how other planets orbit the Sun because it helps us locomotion to those planets ! For model, if we want a spacecraft to safely travel to another satellite, we have to make sure we know where that satellite is in its orbit. And we besides have to make sure we don ’ thyroxine run into any other orb objects — like planets or asteroids — along the way.
Scientists who study Mars besides need to keep a martian calendar to schedule what rovers and landers will be doing and when .
*Length of class on early planets calculated from data on the NASA Solar System Dynamics web site .