AAO image reference AAT 27. « Previous || Next »
Top left is NE. Image width is about 23 arc min
Image and text © 1987-2010, Australian Astronomical Observatory, photograph by David Malin.
Very hot, massive stars lose substantial amounts of matter from their surfaces during much of their brief lives. Mass-loss is usually a fairly steady process but some stars occasionally develop instabilities and have major outbursts. This star has thrown off at least two distinct lots of material during its lifetime, the brightest and most recent being the bright lobes of NGC 6164-5 at the centre of the picture (see image AAT 21 ) while a much fainter rim of nebulosity can be seen at a considerable distance from the central star, indicating an earlier episode of violent ejection. The nebula is in Norma, in the southern Milky Way at a distance of about 4200 light years.
AAT 21. The NGC 6164-65 nebula
Constellation of Norma (external site)
For details of photographic exposure, search technical table by AAT reference number
| emission nebulae
| reflection nebulae
| dark nebulae
| planetary nebulae
| star clusters
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