Volcanology provides scientists with knowledge of the Earth’s internal structure and processes. We can apply the same volcanological methods we use to study Earth’s interior and volcanic processes on different planets and astronomical bodies in our solar system. This research project provides a comparative analysis of volcanic activity on different astronomical bodies in our solar system by examining three important geophysical phenomena. First was utilizing fluid mechanics to understand the cooling of planetary lava flows. By using different atmospheric properties found on each body, we calculated the radiative and convective heat fluxes of their lava flows to analyze the different rates of cooling of each body. Second was comparing the exsolution, or release of gas, of volatiles in each body’s magma and comparing the different depths required for exsolution to occur. Finally, was a comparison of the depths necessary for magma fragmentation to occur at different pressures on each astronomical body. By comparing volcanic activity on different astronomical bodies, we can further our understanding about the formation and evolution of planets and other bodies in our solar system.