NGC6164 and NGC6165 in Norma, the carpenters square (Geoff Healey)

Celestial hemisphere: Southern · Constellation: Ara (Ara) · Contains: NGC 6164 · NGC 6165

NGC6164 and NGC6165 in Norma, the carpenters square, Geoff Healey

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NGC6164 and NGC6165 in Norma, the carpenters square

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NGC6164 and NGC6165 in Norma, the carpenters square

NGC6164 and NGC6145 and its Magnetic star in the constellation of Norma
The magnetic star HD 148937 is the only Galactic Of?p star surrounded by a nebula. The structure of this nebula is particularly complex and is composed, from the center out outwards, of a close bipolar ejecta nebula (NGC 6164/5), an ellipsoidal wind-blown shell, and a spherically symmetric Strömgren sphere. The exact formation process of this nebula and its precise relation to the star’s evolution remain unknown.
Courtesy aanda.org

There is a further outer bluish nebulosity rich in O3 that was the result of an earlier ejection. It is just visible over the dense background of Ha. The stars are RGB.A clear night enabled more Ha and O3 to be gathered and has helped in showing the expanding oxygen rich bubble around the nebula.

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NGC6164 and NGC6165 in Norma, the carpenters square

NGC6164 and NGC6165 in Norma, the carpenters square

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NGC6164 and NGC6165 in Norma, the carpenters square

NGC6164 and NGC6165 in Norma, the carpenters square

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