So yea ive found this out the other day and pretty much got it all down.
to find this location, when you start off on the free explore, just go left and keep going through all teh tunnels and such and youll eventually make it to Skywatch. enjoy the grind my friends.
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#Destiny
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I find that the best area for this is in the Rocket yard. because you can run around in a big circle and get 5 or 6 chest each rotation. There is also about 4 big chest and 4 little chest the first 4 or 5 rotations you do then it is all little chest. By doing this I had farmed about 8k in an hour. When The beta comes back up I will post a video of how to do it there for anyone that is interested.