Eclectic Eccentricity is a great resource for the space-minded who want jewelry to tastefully broadcast that fact. Provided they can get something from the Cosmos Collection before it sells out.
The necklace above is the "Perfect Alignment Solar System Necklace." Among other pieces, check out the "Lost In Space Bracelet," "Comet What May Earth Locket," and the "To Infinity! Space Shuttle Necklace."