SAGITTARIUS (Nov. 22-Dec. 21): NASA used whale oil to lubricate the Hubble Space Telescope and Voyager spacecrafts. There was a good reason: Whale oil doesn’t freeze at outer space's low temperatures. I don’t approve of killing whales for their oil, but I'm making a point. It’s a great time to use old-school approaches to solve ultra-new-school problems. Sometimes a tried-and-true method works better, or is cheaper, simpler or more aesthetically pleasing.