people who study the solar system
Planetary science, also known as planetology and closely related to planetary astronomy, is the science of planets, or planetary systems, and the solar system. their is only one thing you can call a person who studies the planets which is astronomer. astronomers study everything in the universe.... astrophysicists study the forces in the universe (they are much more in depth to thinks like.....what happens at singularity...) and planetologists (sp) are the people who study, specifically, planets.