The California Planet Search has collected thousands of spectra with the mighty 10m Keck Telescope to search for planets around other stars. These spectra, however, contain a wealth of information in addition to a star’s radial velocity. I measured the abundances of carbon and oxygen in a large number of stars using a LTE spectrum synthesizer called SME (Spectroscopy Made Easy). I found that 10% of stars have C/O>1. Such stars enriched in carbon could host radically different small planets, composed of carbides, diamond, and tar rather than silicates which are common among the small planets in the solar system.