NGC 6548 is a bright planetary nebula located in the constellation of Cygnus. It was discovered by the astronomer William Herschel in 1786. This nebula is approximately 2,000 light-years away from Earth and is known for its distinct round shape and vibrant colors, which are produced by the ionization of gas surrounding a dying star. The central star of NGC 6548 is a hot, luminous object that has shed its outer layers, creating the nebula. The nebula's size is about 0.5 light-years across, and it is part of a larger group of planetary nebulae that showcase the final stages of stellar evolution.