Sabine Stanley, PhD, is a Bloomberg Distinguished Professor of Planetary Physics at Johns Hopkins University focusing on magnetic fields and other geophysical elements as a means of studying the interiors of planets, moons, asteroids, and exoplanets. She is a 2011 Alfred P. Sloan Research Fellow, received the William Gilbert Award of the American Geophysical Union in 2010, and held a Canada Research Chair in Planetary Physics from 2012 to 2017. She is a participating scientist on the NASA Mars InSight mission investigating Mars’s ancient magnetic field, and she leads the Magnetism & Planetary Interiors research group. Her work has been featured in National Geographic Magazine, Bloomberg View, CBC Radio’s Quirks and Quarks, and the Washington Post. She is the creator of The Great Courses lecture series “A Field Guide to the Planets.”