Andromeda Galaxy Shining Perfectly Aligned with a Chimney in a Single Photo Exposure
Alqueva´s Dark Sky Reserve | By Year: 2021 | Deep Sky Landscape | Mértola & Mina São Domingos
Featured as NASA’s APOD – Astronomy Picture of the Day a deep nightscape scene shows a single shot photo made with Polarie U tracking portable mount of the entire Andromeda Galaxy M31 rising, while it was perfectly aligned above one of the chimneys from the century old mine of São Domingos, in Achada do Gamo, Dark Sky® Alqueva – Mértola. With approximately 4 times the angular size of the full moon as seen from Earth, the great spiral galaxy Andromeda is at a mere 2.5 million light-years distant from us, being the closest large spiral to our own Milky Way. In really dark places we can clearly distinguish this naked eye galaxy, the image though, captured with a Nikon D850 modified camera and a 105mm Sigma Art lens set to f/2 with an ISO2500, could reveal during this single short exposure of 25 seconds, much more interesting details like the spiral violet arms from Ha light emission, involved in the oblong faint bluish white dust, as well as, the satellite companion galaxies of M110 (elliptical shape visible above) and M32, with its peculiar round diffuse shape located below, in the most outer arm. To enjoy a behind the scene editing of this single image, please see and follow my Intagram Page.
PT: Destacada como NASA’s APOD – Astronomy Picture of the Day a imagem mostra uma paisagem nocturna profunda de uma única exposição fotográfica feita com seguimento sideral, através da montagem portátil Polarie U, onde é possível ver a galáxia de Andrómeda M31, enquanto nascia e se encontrava perfeitamente alinhada acima de uma das chaminés da mina centenária de São Domingos, na Achada do Gamo, Dark Sky ® Alqueva – Mértola. Com aproximadamente 4 vezes o tamanho angular da lua cheia vista da Terra, a grande galáxia espiral de Andrómeda está a apenas 2,5 milhões de anos-luz de distância de nós, sendo a grande espiral mais próxima da nossa Via Láctea. Em lugares realmente escuros como o Dark Sky® Alqueva, podemos distinguir claramente esta galáxia a olho nu, a imagem porém, captada com uma câmara modificada Nikon D850 e uma lente Sigma Art de 105 mm ajustada para f/2 e com ISO2500, pôde revelar durante uma curta exposição singular de 25 segundos, detalhes muito mais interessantes, como os braços em espiral de cor violeta provenientes da emissão de luz H-alfa, envoltos na poeira oblonga e azul esbranquiçada, bem como as galáxias satélite M110 (forma elíptica visível acima) e M32, forma peculiar difusa e redonda, localizada abaixo, no braço mais externo da galáxia. Para ver um “behind the scene” da Edição desta exposição singular, aceda e siga a minha página de Intagram.
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