Messier 97, the Owl Nebula

Here’s a classic object for this time of year, the ghostly Owl Nebula, in a false-colour image taken through H alpha and OIII filters.

It gives the impression of two spherical shells of gas displaced from one another, but, unlike some other planetaries, it has very little colour, looking much the same in H alpha as OIII light.
Taken over three nights, and processed with Nebulosity 2.5.3 and Photoshop CS4. (Click to enlarge)

Messier 97

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