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1# Space Age
2
3Welcome to Space Age on Exercism's Rust Track.
4If you need help running the tests or submitting your code, check out `HELP.md`.
5
6## Instructions
7
8Given an age in seconds, calculate how old someone would be on:
9
10 - Mercury: orbital period 0.2408467 Earth years
11 - Venus: orbital period 0.61519726 Earth years
12 - Earth: orbital period 1.0 Earth years, 365.25 Earth days, or 31557600 seconds
13 - Mars: orbital period 1.8808158 Earth years
14 - Jupiter: orbital period 11.862615 Earth years
15 - Saturn: orbital period 29.447498 Earth years
16 - Uranus: orbital period 84.016846 Earth years
17 - Neptune: orbital period 164.79132 Earth years
18
19So if you were told someone were 1,000,000,000 seconds old, you should
20be able to say that they're 31.69 Earth-years old.
21
22If you're wondering why Pluto didn't make the cut, go watch [this
23youtube video](http://www.youtube.com/watch?v=Z_2gbGXzFbs).
24
25Some Rust topics you may want to read about while solving this problem:
26
27- Traits, both the From trait and implementing your own traits
28- Default method implementations for traits
29- Macros, the use of a macro could reduce boilerplate and increase readability
30 for this exercise. For instance,
31 [a macro can implement a trait for multiple types at once](https://stackoverflow.com/questions/39150216/implementing-a-trait-for-multiple-types-at-once),
32 though it is fine to implement `years_during` in the Planet trait itself. A macro could
33 define both the structs and their implementations. Info to get started with macros can
34 be found at:
35
36 - [The Macros chapter in The Rust Programming Language](https://doc.rust-lang.org/stable/book/ch19-06-macros.html)
37 - [an older version of the Macros chapter with helpful detail](https://doc.rust-lang.org/1.30.0/book/first-edition/macros.html)
38 - [Rust By Example](https://doc.rust-lang.org/stable/rust-by-example/macros.html)
39
40## Source
41
42### Created by
43
44- @IanWhitney
45
46### Contributed to by
47
48- @ashleygwilliams
49- @bobahop
50- @coriolinus
51- @cwhakes
52- @durka
53- @eddyp
54- @efx
55- @ErikSchierboom
56- @IanWhitney
57- @joshgoebel
58- @lutostag
59- @nfiles
60- @ocstl
61- @petertseng
62- @rofrol
63- @stringparser
64- @xakon
65- @ZapAnton
66
67### Based on
68
69Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. - http://pine.fm/LearnToProgram/?Chapter=01 \ No newline at end of file