Geoff Marcy is a Berkeley professor of astronomy and, in little more than a decade, his research team has discovered about half of the known planets outside of our solar system. I sat in with him one night this fall as he used the Keck telescope to scan nearby stars for planets. The result is a four-and-a-half-minute(!) audio slideshow in which he explains his work and how he got started in this somewhat unusual field.
Artist’s conception of the 55 Cancri system courtesy NASA/JPL-Caltech and W. M. Keck Observatory.