Fundamental Questions Concerning the Solar System To understand the various objects found within our solar system, scientists pose five fundamental questions. Here, an “object” is defined to be a planet, moon, asteroid, or comet (1) Describe the object in detail – what is it ? (2) What physical and geological processes are currently active on or inside this object ? (3) How and when did this object form ? (4) How did this object evolve to its present state ? (5) What can be predicted about its future evolution ? Most of the activity in planetary science involves obtaining data to address questions (1) and (2), which then helps inform theories attempting to answer questions (3), (4), and (5).