NGC 6946, also known as the "Fireworks Galaxy," is a spiral galaxy located about 22 million light-years away in the constellation Cepheus. It is notable for its high rate of star formation, which has led to several supernovae being observed within it, earning its nickname. Discovered by William Herschel in 1798, NGC 6946 has a diameter of approximately 100,000 light-years. Its structure features prominent spiral arms filled with young, bright stars and regions of gas and dust, making it a fascinating subject for astronomers studying galaxy formation and evolution.