In the summer and autumn of 2006 I read several interviews with Brian May in which he mentioned his desire to complete the PhD that he had abandoned in 1974. I looked up the papers he had published while a PhD student, which were on spectroscopic studies of the motion of the dust responsible for the zodiacal light, and felt that there was a basis for a thesis. Since he had been a student at Imperi
![A Survey of Radial Velocities in the Zodiacal Dust Cloud](https://cdn-ak-scissors.b.st-hatena.com/image/square/e52712ef257e68b8b0a88d5288b2255d907631e1/height=288;version=1;width=512/https%3A%2F%2Fmedia.springernature.com%2Fw153%2Fspringer-static%2Fcover%2Fbook%2F978-0-387-77706-1.jpg)