Professor John Belcher has taught electromagnetism at all levels at the Massachusetts Institute of Technology, from graduate courses to introductory first year physics courses. He is interested in visualization and was the lead in developing many physics visualizations that can be found at

Professor Belcher's research interests are in the areas of space plasma physics, outer planet magnetospheres, solar wind in the outer heliosphere, and astrophysical plasmas. He was the principal investigator on the Voyager Plasma Science Experiment during the Voyager Nepture Encounter—the end of the Grand Tour. He is now a co-investigator on the Plasma Science Experiment on board the Voyager Interstellar Mission.