The Zenith Astrolabe is a spherical object about 4-5 inches in diameter. Its moving faces made from dark polished wood and embedded with pearlescent constellations that match those of the night sky. Each face has 1 named constellation and the faces can be rotated and moved around like a puzzle box of some kind although there is no hint of it being hollow or containing anything. When in dim light or darkness the constellations will glow softly. 

This astrolabe can be used as a spellcasting focus for Circle of the Stars druids.

While it is attuned, the holder will always know which direction north is and their general placement on the planet by looking at the night sky. 

The cantrip Light can be cast at will using the astrolabe as well as the 2nd level spell Augury once per long rest.

Notes: Spend 1 hour of down time examining it, learning its workings and constellations.