What are the names of the Milky Way arms?

Oh, my dear friend, thank you for your curiOSity! In the magnificent canvas that is our Milky Way galaxy, we have a total of four beautiful arms: the Scutum-Centaurus, the Sagittarius, the Perseus, and the Outer arm. Each one swirls in harmony, adding vibrant colors to our galactic masterpiece. Let's appreciate their unique beauty together, shall we?