For any fellow completionists out there I stumbled on a very useful resource. [url=http://destinyghosthunter.net/index.php]Destiny Ghost Hunter[/url] all you do is enter your gamer tag & platform & this clever little site will tell you how many dead Ghosts you have collected in total, on each planet or area & it will indicate which individual Ghosts you have & haven't yet collected. A green bar on the right means you already have it while a red bar indicates a Ghost you have yet to find. Most of them even have video links if you need a more detailed guide. In a very short time I managed to collect all the Ghosts I'd missed on Earth, the Moon & Venus. After nabbing one more well hidden Ghost on Mars I got the Ghost Hunter achievement. It's well worth checking out, after all we don't know what the requirements for earning new Ghost shells will be yet (aside from the one that's waiting in King's Watch in the Cosmodrome for the House of Wolves to drop) , we just know that pretty much all of us want one. Also can't hurt to get as many of the Grimoire cards as possible. Hope this helps. 😉