William H. Waller (Bill) is a PhD astronomer, science educator and communicator based in Massachusetts, USA. He has worked with NASA on several space science research missions and educational outreach programs. He continues to teach and mentor students in both high-school and collegiate settings. His research focus concerns the causes and consequences of massive star formation in galaxies. His award-winning general interest books span all astronomical scales - from the Solar System to the Milky Way galaxy, nearby universe of galaxies, and beyond to the cosmic frontier. He currently produces Doc Waller's Earth & Space Reports and co-edits The Galactic Inquirer, a free online journal on diverse astronomical topics. He also serves as one of six National Astronomy Education Coordinators (NAECs) representing the United States for the International Astronomical Union's Office of Astronomy for Education (IAU/OAE).