No. It isn’t a piece of neo-retro jewelry based on the ubiquitous Smiley icon that festoons e-mail and internet message-boards like an incurable outbreak of digital herpes. It’s the Nebra Sky Disk, fashioned from bronze and gold, from Cornwall, in England, and it’s 4,500 years old, making it the oldest known representation of the cosmos made by humans. (As opposed to those made by, er, non-humans? Hmm.) Anyway, it’s pretty nifty, huh?