Hopkins professor uses virtual reality goggles to study Mars
By TRISHA PARAYIL | April 11, 2019Kevin Lewis’ most recent project was to use gravity to “weigh a mountain” on Mars. In introductory physics classes, gravity is taught to be a constant equal to 9.8 meters per second. In reality, it varies from place to place depending on what is beneath you. If you stand on an iron ore, the pull of gravity will be a bit stronger. This quality makes gravity a useful geological tool to interrogate the subsurface of a planet. If gravity measurements do not match previously established expectations, then scientists can discern the density of the rocks underneath the surface.