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:

Robert Rubin (NASA/ESA Ames Research Center), Reginald Dufour and Matt Browning (Rice University), Patrick Harrington (University of Maryland), and NASA/ESA

About the Image

NASA press release
NASA caption
Id:opo9811h
Type:Observation
Release date:19 March 1998, 06:00
Size:598 x 583 px

About the Object

Name:IRAS 19411-1416, Little Gem Nebula, NGC 6818
Type:Milky Way : Nebula : Type : Planetary
Constellation:Sagittarius
Category:Nebulae

Image Formats

Large JPEG
126.5 KB
Screensize JPEG
204.5 KB

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

BandWavelengthTelescope
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

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