CHAPTER 2:
CALLING ATTENTION TO THE HARO : A COSMIC CONUNDRUMGyulbudaghian! This is the name by which this object introduces itself to us, welcoming us to these lands, and proudly displaying its luminescent cloak. Later, we will discover its true nature, which it conceals under this fascinating milky loop-shaped envelope.
It seems clearly delighted by our presence, indicating to us how fortunate we are to be able to behold it. It admits to having occasionally encountered visitors, but it seems this is the first time it has welcomed someone during such a bright period.
After recounting its life to us, evidently as tumultuous as the swampy expanses surrounding it, it suddenly adopted a more serious tone to warn us, urging us to keep our distance in order to better recognize the threat looming in the region.
Gyulbudaghian is a part of it, but finds itself powerless against this reality. It is bound by an inevitable destiny and can only watch the inexorable advance of this threat, calmly sweeping across the infinity of space.
CHRONICLES OF KNOWLEDGE
HH for Herbig HaroThe nebula discovered by astronomer Armen Gyulbudaghian is the bright triangular-shaped part at the center of the image, from which the loop of matter seems to spring. It is associated with the star PV Cephei and the Herbig Haro object HH-215.
Herbig Haro objects are emissions of gas and dust that occur when young stars eject matter at high speed. They form when these jets of matter collide with the surrounding gas and dust. These shock regions emit visible light, infrared, and other wavelengths of the spectrum.
In this image, we can distinguish the star PV Cephei as well as the two characteristic bipolar jets of Herbig Haro objects.
It is noticeable that the northern jet, the one pointing in the direction of the loop, is very bright, while the southern jet is obscured by a dark nebula, giving it a less luminous appearance.
However, the most remarkable feature of this nebula lies elsewhere.
Gyulbudaghian and its Herbig Haro object stand out for their evolution on an unusual time scale for deep-sky observers.
Their brightness can change over a period of several months.
Therefore, depending on when astronomers observe this fascinating nebula, they may perceive it as very bright or almost elusive!
To illustrate this peculiarity, here is a series of images of this object taken over a period of several months, and finally, an animation created by Chris Deforeit, tracing its evolution over 22 years.
GYULBUDAGHIAN.mp4Thank you for reading,
Hier is the link to Chapter 3 :
https://www.astrobin.com/p801y1/
Malik 
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