Solar Chromosphere Featuring a Large Prominence 6,5 Times Larger than Earth

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Captured on May 25, 2020, from my backyard near Dark Sky® Alqueva region, Portugal, around noon with a Solar Ha telescope – at the wavelength of Hydrogen-Alpha, the high-resolution image features a gigantic solar prominence visible in great detail around the sun´s limb due to an exceptional seeing conditions (very good atmospheric stability). As in average the solar disc has a diameter of 1,391,000 km, we can determine that the large prominence could reach around 83,000 km high, which means 6,5 times larger than our planet Earth with a diameter of 12,742 km. The image also shows spicules and supergranulation in the surface of the Sun. Granules, as well as sunspots, appear in a layer we call the Photosphere (sphere of light). Being from this same surface that emerges all the light we visually see, leaving our star, it is involved in the Chromosphere (sphere of color), which is the place where we can observe solar Prominences, where Solar Flares do occur. Our Sun is composed of 73% Hydrogen, 25% Helium and 2% from heavier elements. The image is also featuring other smaller prominences spread around the solar limb, in the Chromospher. To see the full report sequence with close-up shots of the large prominence, and time laspe video, click here.

PT: Captada em 25 de maio de 2020, a partir do meu terraço perto da região do Dark Sky® Alqueva, Portugal, por volta das 12h00 com um telescópio Solar Ha – no comprimento de onda do Hidrogénio Alfa, a imagem de alta resolução apresenta uma gigantesca promeminência solar visível em grande detalhe ao redor do limbo do sol, graças a condições de seeing excepcionais (excelente estabilidade atmosférica). Como em média o disco solar tem um diâmetro de cerca de 1.391.000 km, podemos determinar que esta proeminência é de facto gigante podendo atingir cerca de 83.000 km de altura, o que significa 6,5 ​​vezes maior que o nosso próprio planeta Terra com um diâmetro de 12.742 km. A imagem também mostra a superfície supergranulada do Sol e repleta de espículas. Os grânulos assim como as manchas solares, aparecem numa camada a que chamamos a Fotosfera (esfera de luz). Sendo desta mesma superfície que emerge toda a luz que vemos sair visualmente da nossa estrela, está envolta na Cromosfera (esfera de cor), sendo o local onde podemos observar Filamentos de Gás e Protuberâncias Solares, ou Proeminências, regiões onde ocorrem as chamadas “explosões solares”. O nosso Sol é composto por 73% de Hidrogénio, 25% de Hélio e 2% de elementos mais pesados. A imagem revela ainda outras pequenas protuberâncias que se espalham à volta do limbo solar, na cromosfera. Para ver o report completo com imagens em close-up da grande proeminência visível nesta fotografia e uma sequência vídeo em time lapse, clique aqui.


Technical details | Detalhes Técnicos

LUNT LS100T Ha | AZ-HEQ5GT | ASI178MC | Stack of 250 frames for each single image, captured in very good seeing conditions (average of 1″ arcs) from Dark Sky® Alqueva territory, Portugal.


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