• Hint, please?

Question related to mission Earth Distances

 

Hi, um, I'm not entirely sure where to even start on this mission, could you please give me a couple of hints or referrals to help get me on the right path, at least?

Cheers :)

Created at: 2014/12/25 10:03; Updated at: 2014/12/27 13:26
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NerdAlert1101