system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What is a dwarf planet ?


assistant
In August 2006, the International Astronomical Union (IAU) defined a dwarf planet as a celestial body that :
- orbits the Sun, 
- has enough mass to assume a hydrostatic equilibrium (nearly round) shape,
- has not "cleared the neighbourhood" around its orbit,
- is not a satellite.