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https://www.kids-world-travel-guide.com/solar-system.html

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Solar System Facts for Kids | Planets for Kids | Geography | Quiz

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Our Solar System Facts for Kids will provide interesting and fun facts about planets of our Sun. And here you will find our link to the solar systems quiz

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https://www.bbc.co.uk/programmes/articles/2195Yp5ZLslBQrrCjYPYh1T/planets-fact-files

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BBC Two - The Planets - Planets Fact Files

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Find out more about our planetary neighbours

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https://spaceplace.nasa.gov/years-on-other-planets/en/

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A year on Earth is approximately 365 days. Why is that considered a year? Well, 365 days is about how long it takes for Earth to orbit all the way around the Sun one time.

It's not exactly this simple though. An Earth year is actually about 365 days, plus approximately 6 hours. Read more about that here.

All of the other planets in our solar system also orbit the Sun. So, 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 Earth. Planets that orbit farther from the Sun than Earth have longer years than Earth.

This happens for two main reasons.

1. 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.

2. 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!

Why does NASA care about years on other planets?

NASA needs to know how other planets orbit the Sun because it helps us travel to those planets! For example, if we want a spacecraft to safely travel to another planet, we have to make sure we know where that planet is in its orbit. And we also have to make sure we don't run into any other orbiting objects - like planets or asteroids - along the way.

Scientists who study Mars also need to keep a Martian calendar to schedule what rovers and landers will be doing and when.

*Length of year on other planets calculated from data on the NASA Solar System Dynamics website.

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You probably know that a year is 365 days here on Earth. But did you know that on Mercury you'd have a birthday every 88 days? Read this article to find out how long it takes all the planets in our solar system to make a trip around the Sun.