The Gorgeous Butterfly Nebula NGC 6302 Emerges from a Dying Star What a beautiful image of the Butterfly Nebula. This planetary nebula is a result of a dying star that was 5 times the mass of our own Sun and released a fury of hot gasses and a stream of ultraviolet radiation. For those of you who don’t know it’s called a planetary nebula because when viewed through a telescope it appears to look like a planet. In the 1780’s William Herschel coined the term planetary nebula even though it is a misnomer, astronomers still use the term today. The gas you see in the image is ripping through space at 965,606 km an hour (600,000 miles an hour), fast enough to travel from the Earth to the Moon in 24 minutes! If you wanted to take a trip to the Butterfly Nebula or also known as the Bug Nebula it would take you about 2,200 years travelling at the speed of light....