Object Analysis

The Blue Flash Nebula (NGC 6905) is a planetary nebula in the constellation Delphinus. It was discovered by William Herschel in 1784. It gets its name from its distinctive blue-teal color, which is easily visible in larger amateur telescopes, appearing like a sudden flash of color in the small constellation of the Dolphin.

The nebula has a roughly spherical shape with internal structure that looks like a delicate lattice. The central star is a hot white dwarf with a surface temperature of about 50,000 K. It is located approximately 3,000 light-years from Earth. The nebula is currently expanding into the surrounding interstellar medium at a high velocity.

At the edge of the nebula, there are two faint "cones" or jets of gas. These features suggest that the mass-loss process from the dying central star was not perfectly symmetrical, likely influenced by the star's rotation or a hidden companion. These jets are typical of many complex planetary nebulae that display bipolar features.