oldzoggy:
Cheers; and I'll definitely have to look into those books. To be honest I didn't know there was much information provided for such areas of space, so definitely worth my time to read
From the Warhammer
40K Wikia:
As is true of the Calixis Sector itself, the Expanse was untouched by the God-Emperor’s Great Crusade many millennia ago -- and so it is a realm of fearsome xenos, treasures beyond imagining, heathen worlds of men, and the echoes of ancient doom.
I would have to do more reading to be sure, but that sounds to me the Imperium has a limited presence to say the least, which may work to my advantage for what I have in mind. So hopefully the books and other further reading will help me craft my own stories and lore around the area.
@LethalShade:
I've found the positioning of Holy Terra to be in roughly that spot in most maps (
IIRC: that position doesn't correspond with Earth's current location as we know it, but most people just assume that's where it is for the purposes of W40K). Another map (which seems to be a generally well-regarded map) is:
It's not quite as detailed as the one in my original post, and definitely doesn't show as many Imperial worlds, but it places Holy Terra in about the same spot. Also, as you can see on the above map, the Alaitoc Craftworld is place in the Centaurus Arm, but in this case I think it comes down to a combination of the Craftworld positions being estimated but ultimately unknown (for the most part, anyway).