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The Bubble Nebula NGC7635 | by Ralph Smyth
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The Bubble Nebula NGC7635

My attempt at imaging this beautiful object over two nights last month. This is a go at an HOO image of the Bubble Nebula in Cassiopeia.


Also catalogued as Sharpless 162 & Caldwell 11 the Bubble Nebula is an HII rich emission nebula.


The bubble is the result of a sphere of gas escaping into space powered by the stellar wind from a massive super hot young central star.


This star is around 45 times more massive than our sun.


The surrounding molecular cloud of predominantly molecular Hydrogen is containing the expansion of the gas bubble whilst it itself is being excited by the hot star. This is causing the cloud to glow around the bubble.


Imaged with an Esprit 120ED and a ZWO 1600MM camera. Baader Ha and OIII filters.


40x300s Ha

40x300s OIII


Thanks for looking!


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Taken on September 23, 2019