These are the $30 Planetary String Lights available exclusively from ThinkGeek. Each string contains 10 painted 2-inch bulbs (the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and heck yeah, Pluto) on an 11-foot cord. They're made for indoor use only and come with a warning that you shouldn't connect more than six sets together. So for those of you who feel like $180 worth of planetary string lights just isn't enough and you have to add that seventh set, you will burn your house to the ground. You have been warned. They also sell replacement bulb sets for $20. It's just going to suck when Earth burns out two times in a row before any of the other bulbs and you're stuck sticking Uranus in there hoping nobody will notice. I'll notice though because I know Uranus like the back of my hand, and I'll call you out at your own party and embarrass you in front of all your friends. I'll say something like, 'I don't know what solar system you live in, but Uranus doesn't belong there!' Everybody will have a good laugh before asking who the hell I am and why I'm there. I'll grab as many beers as I can while I'm being kicked out, ending my exemplary textbook party crash.
Keep going for a couple more shots including closeups of all the bulbs.
Thanks to Simon, who knows what I like, and I like outerspace. Also, there should be an LED version come on now.