Wain
From Tolkien Gateway
Wain was the name in the northern lands of Middle-earth for the constellation we know today as the Plough or the Big Dipper. In Tolkien's legendarium, these seven stars were set in the sky by the Vala Varda in the shape of a mighty sickle, as a warning to Melkor and his servants. The Men and Hobbits of the northern lands seem to have been ignorant of this, though: they gave these stars the more prosaic name of "The Wain", meaning a wagon or cart.
