1. The study of planets, planetary systems and the solar system
   - planetology

Encyclopedia: Planetary science

• agrimony
• Agriocharis
• Agriocharis ocellata
• Agrippa
• Agrippina
• Agrippina the Elder
• Agrippina the Younger
• agritourism
• agro-
• Agrobacterium
• Agrobacterium tumefaciens
• agrobiologic
• agrobiological
• agrobiology
• agrochemical
• agrologic
• agrological
• agrology
• agromania
• agronomic
• agronomical
• agronomist
• agronomy
• Agropyron
• Agropyron cristatum