This Mike Brown (definitely on the Good list) is a highly respected astronomer at CalTech who triggered the debate about what is and is not a planet.

CNN.com - Astronomers claim discovery of solar system's 10th planet - Jul 31, 2005

Today I Stumbled Upon this Mike Brown’s weekly colunm: http://www.mikebrownsplanets.com/

and his homepage at CalTech is http://www.gps.caltech.edu/~mbrown/