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
Which of the following does not fit with the others on the list? Please explain your reasoning.
Galaxy M81
Black Eye Galaxy
Pinwheel Galaxy
Andromeda Galaxy
Sombrero Galaxy


assistant
Of the 5 galaxies on the list, the Sombrero Galaxy is the only one that is not clearly a spiral galaxy. While some sources do describe the Sombrero Galaxy as a spiral galaxy, most acknowledge that it has an usual shape that differs from most spiral galaxies.