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Imaging telescopes or lenses: William Optics Zenithstar2 80/545
Imaging cameras: ZWO ASI1600MM-Cool
Mounts: Skywatcher AZEQ5
Guiding telescopes or lenses: William Optics Zenithstar2 80/545
Guiding cameras: QHYCCD Qhy5L II
Focal reducers: TS Optics TS PHOTOLINE 0.79x reducer / corrector
Software: Deek Sky Stacker 3.3.4 · Adobe Photoshop 6 CS · Pisinsight 1.8
Frames: 36x300"
Integration: 3.0 hours
Astrometry.net job: 2752727
RA center: 17h 25' 18"
DEC center: -24° 13' 40"
Pixel scale: 1.757 arcsec/pixel
Orientation: 81.637 degrees
Field radius: 1.420 degrees
Resolution: 4648x3497
Data source: Backyard
English Below
Essa bela nebulosa escura, faz parte de um complexo nebuloso escuro muito maior, situado acima do centro galáctico chamado de Dark Horse Nebula. Perto dessa nebulosa, ela é apenas mais uma densa nuvem escura, porém um close revela um objeto muito mais detalhado e belo.
O formato lembra muito a letra S, mas o nome mais famoso que ela recebeu, foi Snake Nebula, ou nebulosa da serpente.
Vale ressaltar, que devido a imensa quantidade de estrelas do campo, essa silhueta só pode ser observado por estar em primeiro plano em relação ao centro Galáctico.
Outra curiosidade é que como esse tipo de objeto não emite luz, ele só pode ser observado quando é iluminado por trás da nuvem de poeira, como é o caso dessa nebulosa.
Está localizada à aproximadamente 650 anos luz de distância de nós.
Ao lado direito da Snake Nebula encontra-se Barnard 68, uma nebulosa muito escura e densa. Abaixo dele encontram-se Barnard 69, Barnard 70 e Barnard 74.
Barnard 68 merece um parágrafo só para ela:
Foi assim nomeada em homenagem a Edward Emerson Barnard. Tem cerca de duas vezes a massa do sol. Está localizada entre 400-500 anos luz de distância na constelação de Ophiuchi.
O que me deixou bastante interessado, é o fato de essa nebulosa ser considerada um Glóbulo de BOK. Uma nuvem escura de poeira e gás cósmico denso que pode colapsar e formar uma estrela densa e quente de baixa massa. A nuvem ainda está sem estrelas, dando aos astrônomos a chance de estudar o primeiro estágio do nascimento das estrelas.
Para uma estrela nascer é necessário que ocorram algumas situações especificas: A nuvem deve estar fria até colapsar. Quando isso ocorre a temperatura interior aumenta, e se o material da núvem for suficientemente pesado, o interior ficará ainda mais quente e os processos nucleares que produzem energia, irão se inflar para uma nova estrela nascer. A boa notícia é que o interior se encontra com temperaturas muito baixas, cerca de -257 graus celsius, e a maioria dos gases estão congelados nos grãos de poeira e isso é vital para que a nuvem colapse. A má notícia é que mesmo estando a beira de um colapso, em idade astrônomica isso significa cerca de 100.000 anos.:(
Todas essas densas nuvem escuras devem ter feito parte de um objeto muito maior que foi varrido por ventos estelares em parcas eras, inclusive é cogitado que possa ter ocorrido uma explosão de supernova nessa região.
This beautiful dark nebula is part of a much larger dark nebula complex, situated above the galactic center called the Dark Horse Nebula. Near this nebula, it is just another dense dark cloud, but a close-up reveals a much more detailed and beautiful object.
The format is very reminiscent of the letter S, but the most famous name it received was Snake Nebula, or snake nebula.
It is worth mentioning that due to the immense amount of stars in the field, this silhouette can only be observed because it is in the foreground in relation to the Galactic center.
Another curiosity is that since this type of object does not emit light, it can only be observed when it is illuminated behind the cloud of dust, as is the case of this nebula.
It is located approximately 650 light years away from us.
On the right side of the Snake Nebula is Barnard 68, a very dark and dense nebula. Below him are Barnard 69, Barnard 70 and Barnard 74.
Barnard 68 deserves a paragraph just for her:
It was named after Edward Emerson Barnard. It has about twice the mass of the sun. It is located between 400-500 light years away in the constellation of Ophiuchi.
What made me very interested is the fact that this nebula is considered a BOK globule. A dark cloud of dust and dense cosmic gas that can collapse and form a dense, warm, low mass star. The cloud is still starless, giving astronomers a chance to study the first stage of star birth.
For a star to be born it is necessary that certain specific situations occur: The cloud must be cold until it collapses. When this occurs the inside temperature increases, and if the material in the cloud is heavy enough, the inside will get even hotter and the nuclear processes that produce energy will inflate for a new star to be born. The good news is that the interior meets very low temperatures, about -257 degrees Celsius, and most of the gases are frozen in the dust grains and this is vital for the cloud to collapse. The bad news is that even being on the verge of collapse, at astronomical age this means about 100,000 years.
All of these dense dark clouds must have been part of a much larger object that has been swept away by stellar winds within a few years, and even a supernova explosion in that region may have occurred.
Captura:
William Optics 80 ED II
ZWO ASI 1600 Mono Cooled
L: 90 minutos
RGB: 30 minutos cada canal
Total: 3 horas de captura.
Edição: PixInsight
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