The star forming region NGC 2264 is an open cluster (The Christmas Tree Cluster) associated to emission nebulae (The Cone and the Fox Fur), 2300 light-years away in Monoceros.
The Fox Fur Nebula has a strange shape originate from fine interstellar dust reacting in complex ways with the energetic light and hot gas being expelled by the young stars.
This is a Ha-RGB version emphasising the ionised hydrogen wisps and the colour of the stars.
The bluish area in the centre of the image is a reflection nebula surrounding the star R. Monoceros.

Newton 250mm f/3.8 on IOPTRON CEM70 mount
Camera ZWO ASI2600mm + ZWo EFW + OAG ASI Mini 290mm
10h20 exposures from december to february 2022 in Amiens (Bortle 7).
Halpha : 86 x 300s
RVB : each 30 x 120s
Processing : Pixinsight et Photoshop

Autore: Mathieu Guinot (sito)