Abstract
Understanding the stability and flow of granular materials depends on both their interparticle interactions and external driving, including from gravity. Yet, the systems we study here on Earth have largely been conducted at one particular value of gravitational acceleration, and not under self-gravity. From a physics perspective, this means we have left important regions of parameter space relatively unexplored. But this also has implications for our community's ability to understand granular materials throughout the solar system, whether applied to planetary and solar system science or to the engineering of future missions to the surfaces of planetary bodies. I will talk about experiments on granular materials currently underway on Earth, and also about what types of experimental platforms might us access to reduced and enhance gravity. Our ability to perform such experiments could open new avenues for both basic science and space exploration.