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segunda-feira, 22 de janeiro de 2018

Astronomy picture of the day - 2018 January 22 - An Immersive Visualization of the Galactic Center

An Immersive Visualization of the Galactic Center 
Video Credit: NASACXCPontifical Catholic Univ. of ChileC. Russell et al.
Explanation: What if you could look out from the center of our Galaxy -- what might you see? Two scientifically-determined possibilities are shown in the featured video, an immersive 360-degree view which allows you to look around in every direction. The pictured computer simulation is based on infrared data from ESO's Very Large Telescope in Chile and X-ray data from NASA's orbiting Chandra X-ray Observatory. As the video starts, you quickly approach Sgr A*, the supermassive black hole in the Galactic center. Then looking out, this 500-year time-lapse simulation shows glowing gas and many points of light orbiting all around you. Many of these points are young Wolf-Rayet stars that have visible hot winds blowing out into surrounding nebulas. Clouds approaching close become elongated, while objects approaching too close fall in. Toward the video's end the simulation repeats, but this time with the dynamic region surrounding Sgr A* expelling hot gas that pushes back against approaching material.

domingo, 21 de janeiro de 2018

Thierry Duval - "O Charme de Paris" - Aguarela

O Charme de Paris

Astronomy picture of the day - 2018 January 21 - The Upper Michigan Blizzard of 1938

See Explanation.  Clicking on the picture will download
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The Upper Michigan Blizzard of 1938 
Image Credit: Bill Brinkman; Courtesy: Paula Rocco
Explanation: Yes, but can your blizzard do this? In Upper Michigan's Storm of the Century in 1938, some snow drifts reached the level of utility poles. Nearly a meter of new and unexpected snow fell over two days in a storm that started 80 years ago this week. As snow fell and gale-force winds piled snow to surreal heights; many roads became not only impassable but unplowable; people became stranded; cars, school buses and a train became mired; and even a dangerous fire raged. Fortunately only two people were killed, although some students were forced to spend several consecutive days at school. The featured image was taken by a local resident soon after the storm. Although all of this snow eventually melted, repeated snow storms like this help build lasting glaciers in snowy regions of our planet Earth.

sábado, 20 de janeiro de 2018

Arusha Votsmusha - "Fantasia" - Aguarela

Brilhantes pinturas feitas com Aquarela

Brilhantes pinturas feitas com Aquarela

Imagens do Mundo - Argentina - Cataratas del Iguazú - Garganta del Diablo

Cataratas del Iguazú - Garganta del Diablo

Artigo - Une comédie musicale pour les touristes fait salle comble à Lisbonne

Une rivalité entre les illustres poètes Luís Vaz de Camões et Fernando Pessoa, une partie de poker entre l’ancien dictateur António de Oliveira Salazar et James Bond, ou encore la chanteuse de fado Amália Rodrigues œuvrant dans une ruelle du célèbre quartier de l’Alfama à Lisbonne : ce sont quelques-unes des scènes qui émaillent The Portuguese (Les Portugais), une comédie musicale destinée aux touristes.

Joué entièrement en anglais par des acteurs portugais, le spectacle affichait complet pour sa première, samedi 13 janvier, au Casino de Lisbonne. Il revisite l’histoire du Portugal de manière “totalement absurde”, assument dans le quotidien Público ses deux auteurs, Rui Cardoso Martins et Filipe Homem Fonseca. L’idée de cette comédie musicale a germé chez eux il y a deux ans, alors que le pays connaissait un boom du tourisme qui s’est poursuivi depuis.
La bande-son s’étend du fado aux Spice Girls

L’intrigue est simple : un couple d’étrangers arrive à Lisbonne et embarque pour une aventure à travers la ville, où des figures marquantes vont leur raconter les événements historiques les plus importants du pays. La mise en scène, volontiers humoristique, s’accompagne d’une bande-son éclectique, qui va du fado aux Spice Girls, en passant par Abba.

Le projet est né de “la volonté de montrer le Portugal au monde”, assure, toujours dans Público, Ana Brito e Cunha, qui met en scène le spectacle avec Sónia Aragão. “On révèle un petit peu de nous. On porte un regard sur les Portugais avec humour, plutôt qu’à travers lasaudade [une forme de nostalgie typiquement portugaise] et la tristesse.” La comédie musicale se veut aussi porteuse de l’idée selon laquelle le Portugal est le champion de la desenrasca (débrouille), que les auteurs ont pris le parti de traduire par un néologisme, “to desenrascate”, in english.

Courrier International - France

Astronomy picture of the day - 2018 January 20 - Old Moon in the New Moon's Arms

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Old Moon in the New Moon's Arms 
Image Credit & CopyrightYuri Beletsky (Carnegie Las Campanas ObservatoryTWAN)
Explanation: Also known as the Moon's "ashen glow" or the "Old Moon in the New Moon's arms", earthshine is earthlight reflected from the Moon's night side. This stunning image of earthshine from a young crescent moon was taken from Las Campanas Observatory, Atacama Desert, Chile, planet Earth near moonset on January 18. Dramatic atmospheric inversion layers appear above the Pacific Ocean, colored by the sunset at the planet's western horizon. But the view from the Moon would have been stunning, too. When the Moon appears in Earth's sky as a slender crescent, a dazzlingly bright, nearly full Earth would be seen from the lunar surface. A description of earthshine, in terms of sunlight reflected by Earth's oceans in turn illuminating the Moon's dark surface, was written 500 years ago by Leonardo da Vinci.

sexta-feira, 19 de janeiro de 2018

Ching Lin Che - Aguarela na chuva

Brilhantes pinturas feitas com Aquarela
Aguarela na chuva
Brilhantes pinturas feitas com Aquarela

Cidades de Portugal - Amarante - Ponte, Igreja e Convento de São Gonçalo

Ponte, Igreja e Convento de São Gonçalo

Astronomy picture of the day - 2018 January 19 - Clouds in the LMC

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Clouds in the LMC 
Image Credit & Copyright: Josep DrudisDon Goldman
Explanation: An alluring sight in southern skies, the Large Magellanic Cloud (LMC) is seen in this deep and detailed telescopic mosaic. Recorded with broadband and narrowband filters, the scene spans some 5 degrees or 10 full moons. The narrowband filters are designed to transmit only light emitted by hydrogen, and oxygen atoms. Ionized by energetic starlight, the atoms emit their characteristic light as electrons are recaptured and the atoms transition to a lower energy state. As a result, in this image the LMC seems covered with its own clouds of ionized gas surrounding its massive, young stars. Sculpted by the strong stellar winds and ultraviolet radiation, the glowing clouds, dominated by emission from hydrogen, are known as H II (ionized hydrogen) regions. Itself composed of many overlapping H II regions, the Tarantula Nebula is the large star forming region at the left. The largest satellite of our Milky Way Galaxy, the LMC is about 15,000 light-years across and lies a mere 160,000 light-years away toward the constellation Dorado.