Given an age in seconds, calculate how old someone would be on:

- Earth: orbital period 365.25 Earth days, or 31557600 seconds

- Mercury: orbital period 0.2408467 Earth years

- Venus: orbital period 0.61519726 Earth years

- Mars: orbital period 1.8808158 Earth years

- Jupiter: orbital period 11.862615 Earth years

- Saturn: orbital period 29.447498 Earth years

- Uranus: orbital period 84.016846 Earth years

- Neptune: orbital period 164.79132 Earth years

So if you were told someone were 1,000,000,000 seconds old, you should

be able to say that they're 31.69 Earth-years old.

If you're wondering why Pluto didn't make the cut, go watch [this

youtube video](http://www.youtube.com/watch?v=Z_2gbGXzFbs).

Go through the setup instructions for Javascript to

install the necessary dependencies:

Install assignment dependencies:

$ npm install

Execute the tests with:

$ npm test

In the test suites all tests but the first have been skipped.

Once you get a test passing, you can enable the next one by

changing `xtest` to `test`.

Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. [http://pine.fm/LearnToProgram/?Chapter=01](http://pine.fm/LearnToProgram/?Chapter=01)

It's possible to submit an incomplete solution so you can see how others have completed the exercise.