Challenge page : http://www.ancientsocieties.com/bulletin-board/
The Challenge Text says Retrograde syzygy…
In the picture given, we can see 5 orbits with little satellites pictures. One of the picture is different.
Using the week answers letters on each picture, writing them clockwise (retrograde), you will see a word on the aligned satellites.
[spoiler title=”Solution to Week 27 – End of Week”]
http://en.wikipedia.org/wiki/Astra_%28satellite%29
The solution page is http://www.ancientsocieties.com/astra/
[/spoiler]