Little Ghost Nebula
|Little Ghost nebula|
|Right ascension||17h 29m 20.443s|
|Declination||−23° 45′ 34.22″|
|Distance||2.0 ± 5.0 kly|
|Apparent magnitude (V)||12.9|
|Apparent dimensions (V)||38 ′|
|Other designations||NGC 6369, PK 002+05 1|
|See also: Planetary nebula, Lists of nebulae|
Round and planet-shaped, the nebula is also relatively faint. Planetary nebulae are not related to planets at all, but instead are created at the end of a sun-like star's life as its outer layers expand into space while the star's core shrinks to become a white dwarf. The transformed white dwarf star, seen near the center, radiates strongly at ultraviolet wavelengths and powers the expanding nebula's glow. The nebula's main ring structure is about a light-year across and the glow from ionized oxygen, hydrogen, and nitrogen atoms are colored blue, green, and red respectively.
- "SIMBAD Astronomical Database". Results for NGC 6369. Retrieved 2007-04-17.
- Nemiroff, Robert; Jerry Bonnell. "NGC 6369: The Little Ghost Nebula". Astronomy Picture of the Day. Retrieved 2010-07-02.