The Sun’s Incident Light Reflected on a Waxing Gibbous Moon


I’ve just realised that since my “Titanium Moon” released and awarded as PCA on APOTY in 2019, I was not spending time to photograph our wonderful natural satellite, which I love, indeed. So I decided to capture a new image on my next opportunity with clear sky, and here it is! Taken on 19th Feb. 2024 the image is showing a Waxing Gibbous Moon but presented in an unusual way. Captured with an HDR technique, on my final composition I intend to show that the Moon is only visible due to the reflection of the Sun’s incident light. At this phase, the Illuminated surface of the Moon was 78%, while the remaining 22% of the Lunar disc was immersed in total darkness. At this stage, the shadow region is not possible to perceive with our naked eyes, due to the strong difference of brightness, but near the crescent moon our planet can illuminate the dark region in a smooth way turning the entire disc visible to the naked eye. This phenomenon is called an Earthshine and it was described for the first time, 500 years ago by Leonardo DaVinci. Taken with my deepsky Poseidon-C Pro Camera from Player One Astronomy and Takahashi FSQ106 from Dark Sky® Alqueva Observatory. Hope you enjoy it as much as I do.

PT: Recentemente apercebi-me que desde que minha “Titanium Moon” foi lançada e premiada como PCA no APOTY em 2019, eu não dedicava algum tempo para fotografar o nosso maravilhoso satélite natural, e que na verdade adoro! Assim, decidi captar uma nova imagem na primeira oportunidade de céu limpo que tive, e aqui está ela! Registada a 19 de Fevereiro de 2024, a imagem mostra uma Lua Crescente Gibosa, mas apresentada de uma forma invulgar. Captada com a técnica HDR, na minha composição final pretendi mostrar que a Lua só é visível devido ao reflexo da luz solar incidente. Nesta fase, a superfície iluminada da Lua representava 78%, enquanto os restantes 22% do disco lunar se encontravam imersos na escuridão total. Nesta fase, a região sombreada não é perceptível a olho nu devido à extrema diferença de brilho da sua superfície, mas próximo da fase crescente, o nosso planeta consegue iluminar a região escura de forma suave, tornando todo o disco visível a olho nu . Este fenómeno é chamado de Earthshine e foi descrito pela primeira vez, há 500 anos, por Leonardo DaVinci. Tirada com a minha  Poseidon-C Pro Camera from Player One Astronomy e Takahashi FSQ106 a partir do Observatório Dark Sky® Alqueva . Espero que vocês gostem tanto quanto eu gostei .


Above are a portrait and 180º rotated version, intended to help conduct the readers attention to the most interesting parts of the image.

PT: Acima está a foto apresentada em uma versão de retrato e de paisagem invertida, com o objetivo intencional de ajudar a conduzir a atenção do leitor para as partes mais interessantes da imagem.


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