What if the Traveler was... [b]THE MOON[/b]!!!
[url=http://gamerhorizon.com/wp-content/uploads/2013/02/Destiny-traveller.jpg]Traveler[/url]
[url=http://i.space.com/images/i/000/005/980/i02/moon-watching-night-100916-02.jpg?1294154541]Moon[/url]
See the resemblance? It also fits in with [url=http://weknowmemes.com/wp-content/uploads/2011/09/ancient-aliens-it-was-aliens.jpg]this guy's[/url] theory about Aliens!
So basically, a long time ago Aliens came to Earth and planted this traveler in our orbit, ready to be unlocked when we need it, but disguised as a normal everyday moon as to not raise suspicion among humans. Then about 500 years from now, we needed it. So, it got rid of it's Earth Moon shell and used Space Magic to replace the Moon so out tides wouldn't get screwed up. But it messed up with the color a little bit, explaining why the Moon is a [url=http://images.vg247.com/current//2013/05/Destiny-Moon1-1152x720.jpg]Grayish[/url]. [url=http://images.vg247.com/current//2013/05/Destiny-Moon-2-1152x720.jpg]Green[/url] in the future as opposed to white. It even makes sense for the Traveler to be smaller than the Moon we have now, because it was surrounded by the Moon, so it doesn't need to be as big.
[i]It all makes sense now...[/i]
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Minus the fact we know the moon is a playable area...