Love...

[Diamond18]

but Middle-Earth is a different world entirely

Well, yes and no. Of course it isn't a true history of our world, but you can pretend that it is for the story purposes. In other words, the stars are the same. Consider the end of Chapter X "Strider"

The Sickle* was swinging bright above the shoulders of Bree-hill.

* The Hobbits' name for the Plough or Great Bear.

The Great Bear would be Ursa Major:
a constellation that is the most conspicuous of the northern constellations, is situated near the north pole of the heavens, and contains the stars forming the Big Dipper two of which are in a line indicating the direction of the North Star—also called the Great Bear
(C)1996 Zane Publishing, Inc. and Merriam-Webster, Incorporated. All rights reserved.

I don't put any stock in horoscopes either. But I believe what my dictionary tells me. [img]smilies/biggrin.gif[/img]