My last attempt on January 25, before entering the Quarantine was a test of 1 photo of 900s to the Horse Head, so I thought it would be for the next season 2020-2021…. But what does being in quarantine and the need to entertain hahahaha, I reminded myself that I had taken some tests at the Observatory in March 2017 and I found them ..., 4 photos of 600s in Ha, so I I added them to the one I took on 25, few but here the result ...

The Horsehead Nebula, or Barnard 33 (B33), or IC434, is a cold, dark cloud of gas, located about 1500 light years from Earth, south of the far left of the Orion belt. It is part of the Orion Molecular Cloud Complex, and is approximately 3.5 light years across. This dark nebula is visible by contrast as it appears ahead of the IC 434 emission nebula. Because of its shape it is the most familiar of the absorption nebulae.

It has a reddish color that originates from the recombination of the electrons with the protons of the hydrogen atoms. The brightest star, located to the left of the nebula, is the popular Alnitak (ζ Orionis) from the Orion belt. The unusual shape of the Horse's Head was first discovered on a photographic plate in the late 19th century by Williamina Fleming, at the Harvard College Observatory. The first to list the Nebula Horsehead in a catalog was Edward Emerson Barnard of the Barnard Family, in 1919.

Reflection nebulae are also seen in the environmental photo, which in a color photo is seen to preferentially reflect the blue light from nearby stars.

In the photograph you can also see the Flame nebula, cataloged as NGC 2024, in the lower left. It receives this name for its resemblance to a bonfire. A dark stripe of absorbent interstellar dust stands out in outline against the glow of hydrogen emission, and in fact hides the true power source of the Flame nebula. A cluster of young, hot stars, seen at infrared wavelengths through obscuring dust. A young massive star in that cluster is the likely source of the intense ultraviolet radiation that ionizes the hydrogen gas in the Flame Nebula.

The image also shows the NGC 2023 nebula, a little below the left of the head; it is a reflection nebula, hence its characteristic bluish color and is illuminated by the star B1.5 HD 37903, the most luminous member of the stars in the molecular cloud Lynds 1630.