Planetary nebula NGC 6818
This Wide Field and Planetary Camera 2image of NGC 6818 shows two distinct layers of gas (with dust): a spherical outer region and a brighter, vase-shaped interior 'bubble.' Astronomers believe that a fast wind - material propelled by radiation from the hot central star - is creating the inner elongated shape. The central star of the planetary nebula appears as a tiny blue dot. The material in the wind is traveling so fast that it smashes through older, slower-moving stellar debris, causing a 'blowout' at both ends of the bubble (lower right and upper left).
Credit:About the Image
About the Object
Name: | IRAS 19411-1416, Little Gem Nebula, NGC 6818 |
Type: | Milky Way : Nebula : Type : Planetary |
Constellation: | Sagittarius |
Category: | Nebulae |
Coordinates
Position (RA): | 19 43 57.69 |
Position (Dec): | -14° 9' 11.58" |
Field of view: | 0.50 x 0.48 arcminutes |
Orientation: | North is 129.4° right of vertical |
Colours & filters
Band | Wavelength | Telescope |
---|---|---|
Optical H-beta | 487 nm |
Hubble Space Telescope
WFPC2 |
Optical OIII | 500 nm |
Hubble Space Telescope
WFPC2 |
Optical H-alpha | 656 nm |
Hubble Space Telescope
WFPC2 |