It is called a "grand design" galaxy because of its well defined spiral arms.
Grand Prix motorcycle racing | Grand Canyon | The Hitchhiker's Guide to the Galaxy | Leadership in Energy and Environmental Design | Grand Trunk Railway | Grand National | Grand Rapids, Michigan | Grand Prix | Grand Duchy of Lithuania | Grand Central Terminal | Grand Theft Auto: San Andreas | Grand Theft Auto IV | Rhode Island School of Design | Grand Tour | Grand Ole Opry | design | Grand Duchy of Hesse | Grand Rapids | Grand Vizier | Grand Union Canal | Houston Grand Opera | Grand Theft Auto V | Grand Théâtre de Genève | Grand Prix motor racing | Grand Duchy of Mecklenburg-Schwerin | Los Angeles Galaxy | Grand Theft Auto | Grand Prix du Disque | Grand Palais | Grand Theft Auto: Vice City |