# Space Age 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). ## Setup There are two different methods of getting set up to run the tests with Objective-C: - Create an Xcode project with a test target which will run the tests. - Use the ruby gem `objc` as a test runner utility. Both are described in more detail here: http://exercism.io/languages/objective-c ### Submitting Exercises When submitting an exercise, make sure your solution file is in the same directory as the test code. The submit command will look something like: ```shell exercism submit /objective-c/space-age/SpaceAge.m ``` You can find the Exercism workspace by running `exercism debug` and looking for the line beginning with Workspace. ## Source 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) ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.