The Rosette Nebula, also known as NGC 2237, is a beautiful and complex emission nebula located in the constellation Monoceros.
This expansive nebula is shaped like a rose (and can also resemble a skull depending on the image orientation) and is illuminated by the radiation from young and massive stars at its center. The Rosette Nebula is also home to several open star clusters, including NGC 2244, which can be seen in the center of the image.
The glowing gas and dust in the nebula contain a mix of elements, including hydrogen, oxygen, and sulfur, which give rise to its vibrant colors.
About the Deep Space Collection:
Shot entirely with my rooftop telescope from the urban skies of Buenos Aires, the Deep Space Collection features many objects observable only from the southern hemisphere.
All images in the collection were shot using individual narrowband filters which cut off most of the light and allow only very specific wavelengths to pass (the light emitted from ionized hydrogen, oxygen and sulfur), making it possible to photograph deep space objects even from the highly light polluted skies of the city.
The images from each separate filter are then processed individually, combined and mapped to RGB channels for a final color image.
Two different color mapping palettes were used in this collection: SHO, where sulfur is mapped to red, hydrogen to green and oxygen to blue in what is referred to as "Hubble Palette" processing (as used in the images the famous space telescope) and HOO, where hydrogen is mapped to red, and oxygen to blue and green.
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