NGC 6559, emission and reflection nebula in Sagittarius
AAO image reference AATCCD 4.     « Previous || Next »

NGC 6559
Top left is NE. Image width is about 7 arc min
Image and text © 1999-2002, Australian Astronomical Observatory, Photograph by S. Lee, C. Tinney and D. Malin.

In the direction of Sagittarius lies the Galactic center and if we could see clearly in that direction the field of view would be filled with myriad stars. But the plane of the Galaxy is very dusty so a direct view is not possible at visible wavelengths. Most of the dust absorbs light, so is dark, but here and there there is some light from embedded stars.

This dusty region is probably associated with the brighter and better-known Lagoon and Trifid Nebulae which are nearby in the sky and part of the same complex of dusty clouds. The soft red glow emitted by fluorescent hydrogen reveals that there are young hot stars associated with the dust. These bright stars also illuminate the tiny solid particles that absorb the light, producing blue reflection nebulae bordering some of the emission regions. The dust is also evident in silhouette as sinuous dark lanes and isolated patches.

Entry from NGC 2000.0 (R.W. Sinnott, Ed.) © Sky Publishing Corporation, 1988:
NGC 6559  Nb 18 10.0  -24 06 s  Sgr   8.         vF, vL, lE, **  inv  
Related Images
UKS 3.     NGC 6559 and IC 1274-75 in Sagittarius
UKS 26.   M8, M20 and the NGC 6559 region in Sagittarius
UKS 26a. M8, M20 and the NGC 6559 region in Sagittarius (wide field)

For details of object position and photographic exposure, search technical table by UKS reference number.

galaxies | emission neb. | reflection neb. | dark neb. | planetaries | clusters | stars | supernovae
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