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terça-feira, 31 de janeiro de 2017

Expressões populares portuguesas - Dar um lamiré

Afficher l'image d'origineSignificado: Sinal para começar alguma coisa. 

Origem: 

Trata-se da forma aglutinada da expressão «lá, mi, ré», que designa o diapasão, instrumento usado na afinação de instrumentos ou vozes; a partir deste significado, a expressão foi-se fixando como palavra autónoma com significação própria, designando qualquer sinal que dê começo a uma actividade. Historicamente, a expressão «dar um lamiré» está, portanto, ligada à música (cf. Dicionário Houaiss da Língua Portuguesa). Nota: Escreve-se lamiré, com o r pronunciado como em caro. 
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Estúdio Mário Novais, Avenida Almirante Reis, Lisboa, sem data Colecções daFundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons)

Astronomy picture of the day - 2017 January 31 - Where to See the American Eclipse

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Where to See the American Eclipse 
Image Credit: Jay AndersonData: MODIS Satellite, NASA's GSFC
Explanation: Are you planning to see the American Eclipse on August 21? A few hours after sunrise, a rare total eclipse of the Sun will be visible along a narrow path across the USA. Those only near the path will see a partial eclipse. Although some Americans live right in path of totality, surely many more will be able to get there after a well-planned drive. One problem with eclipses, though, is that clouds sometimes get in the way. To increase your clear-viewingodds, you might consult the featured map and find a convenient destination with a historically low chance (more blue) of thick clouds overhead during totality. Given the large fraction of Americans carrying camera-equipped smartphones, this American Eclipse may turn out to be the most photographed event in the history of the world.

segunda-feira, 30 de janeiro de 2017

Fotografia - Lisboa noturna - Rua Augusta

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Estúdio Horácio Novais, Rua Augusta, Lisboa, sem data. Colecções da Fundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons)

Astronomy picture of the day - 2017 January 30 - The Cat's Eye Nebula from Hubble

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The Cat's Eye Nebula from Hubble 
Image Credit: NASAESAHubbleHLAReprocessing & Copyright: Raul Villaverde
Explanation: To some, it may look like a cat's eye. The alluring Cat's Eye nebula, however, lies three thousand light-years from Earth across interstellar space. A classic planetary nebula, the Cat's Eye (NGC 6543) represents a final, brief yet glorious phase in the life of a sun-like star. This nebula's dying central star may have produced the simple, outer pattern of dusty concentric shells by shrugging off outer layers in a series of regular convulsions. But the formation of the beautiful, more complex inner structures is not well understood. Seen so clearly in this digitally reprocessed Hubble Space Telescope image, the truly cosmic eye is over half a light-year across. Of course, gazing into this Cat's Eye, astronomers may well be seeing the fate of our sun, destined to enter its own planetary nebula phase of evolution ... in about 5 billion years.

domingo, 29 de janeiro de 2017

Astronomy picture of the day - 2017 January 29 -

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Red Aurora Over Australia 
Image Credit & Copyright: Alex Cherney (TerrastroTWAN)
Explanation: Why would the sky glow red? Aurora. A solar storm in 2012, emanating mostly from active sunspot region 1402, showered particles on the Earth that excited oxygen atoms high in the Earth's atmosphere. As the excited element's electrons fell back to their ground state, they emitted a red glow. Were oxygen atoms lower in Earth's atmosphere excited, the glow would be predominantly green. Pictured here, this high red aurora is visible just above the horizon last week near FlindersVictoriaAustralia. The sky that night, however, also glowed with more familiar but more distant objects, including the central disk of our Milky Way Galaxy on the left, and the neighboring Large andSmall Magellanic Cloud galaxies on the right. A time-lapse video highlighting auroras visible that night puts the picturesque scene in context. Why the sky did not also glow green remains unknown.

sábado, 28 de janeiro de 2017

Expressões populares portuguesas - Memoria de elefante

Afficher l'image d'origineSignificado: 

Ter boa memória; recordar-se de tudo. 

Origem: 

O elefante fixa tudo aquilo que aprende, por isso é uma das principais atracções do circo

Fotografia - Lisboa noturna - Fogo de artifício e holofotes

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Estúdio Horácio Novais, Fogo de artifício e holofotes, Lisboa, sem data. Colecções da Fundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons)

Astronomy picture of the day - 2017 January 28 - N159 in the Large Magellanic Cloud

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N159 in the Large Magellanic Cloud 
Image Credit: NASAESAHubble Space Telescope
Explanation: Over 150 light-years across, this cosmic maelstrom of gas and dust is not too far away. It lies south of the Tarantula Nebula in our satellite galaxy the Large Magellanic Cloud a mere 180,000 light-years distant. Massive stars have formed within. Their energetic radiation and powerful stellar winds sculpt the gas and dust and power the glow of this HII region, entered into the Henize catalog of emission stars and nebulae in the Magellanic Clouds as N159. The bright, compact, butterfly-shaped nebula above and left of center likely contains massive stars in a very early stage of formation. Resolved for the first time in Hubble images, the compact blob of ionized gas has come to be known as the Papillon Nebula.

sexta-feira, 27 de janeiro de 2017

Fotografia - Lisboa noturna - Rua Augusta

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Estúdio Horácio Novais, Rua Augusta, Lisboa, sem data. Colecções da Fundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons)

Imagenes del Mundo - Un buque intenta acercarse al puerto de Liverpool (Reino Unido)

Un buque intenta acercarse al puerto de Liverpool (Reino Unido).
Un buque intenta acercarse al puerto de Liverpool (Reino Unido).
PHIL NOBLE REUTERS

Imagenes del Mundo - El volcán 'Fuego' - Guatemala

El volcán guatemalteco 'Fuego', uno de los más activos del país, inició la primera erupción del 2017 con explosiones "constantes, moderadas y fuertes", en Alotenango, Sacatepéquez (Guatemala).
El volcán guatemalteco 'Fuego', uno de los más activos del país, inició la primera erupción del 2017 con explosiones "constantes, moderadas y fuertes", en Alotenango, Sacatepéquez (Guatemala).
ESTEBAN BIBA EFE

Astronomy picture of the day - 2017 January 27 - Venus Through Water Drops

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Venus Through Water Drops 
Image Credit & Copyright: John Bell
Explanation: Now the brilliant "star" in planet Earth's evening skies, Venus is captured in this creative astrophotograph. Taken with a close-focusing lens on January 18 from Milton Keynes, UK, it shows multiple images of the sky above the western horizon shortly after sunset. The images were created by water drops on a glass pane fixed to a tree. Surface tension has drawn the water drops into simple lens-like shapes. Refracting light, the drops create images that are upside-down, so the scene has been rotated to allow comfortable right-side up viewing of a macro-multiple-skyscape.

quinta-feira, 26 de janeiro de 2017

Fotografia - Lisboa noturna - Praça do Rossio, Lisboa

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Estúdio Horácio Novais, Praça do Rossio, Lisboa, sem data Colecções da Fundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons)

Astronomy picture of the day - 2017 January 26 - GOES-16: Moon over Planet Earth

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GOES-16: Moon over Planet Earth 
Image Credit: NOAANASA
Explanation: Launched last November 19 from Cape Canaveral Air Force Station, the satellite now known as GOES-16 can now observe planet Earth from a geostationary orbit 22,300 miles above the equator. Its Advanced Baseline Imager captured this contrasting view of Earth and a gibbous Moon on January 15. The stark and airless Moon is not really the focus of GOES-16, though. Capable of providing a high resolution full disk image of Earth every 15 minutes in 16 spectral channels, the new generation satellite's instrumentation is geared to provide sharper, more detailed views of Earth's dynamic weather systems and enable more accurate weather forecasting. Like previous GOES weather satellites, GOES-16 will use the moon over our fair planet as a calibration target.

quarta-feira, 25 de janeiro de 2017

Expressões populares portuguesas - Lagrimas de crocodilo

Afficher l'image d'origine
Significado: 

Choro fingido. 

Origem: 

O crocodilo, quando ingere um alimento, faz forte pressão contra o céu da boca, comprimindo as glândulas lacrimais. Assim, ele chora enquanto devora a vítima.

Fotografia - Lisboa noturna - Avenida Almirante Reis

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Estúdio Mário Novais, Avenida Almirante Reis, Lisboa, sem data Colecções daFundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons)

Astronomy picture of the day - 2017 January 25 - Cassini's Grand Finale Tour at Saturn

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Cassini's Grand Finale Tour at Saturn 
Image Credit: NASAJPL-Caltech
Explanation: Cassini is being prepared to dive into Saturn. The robotic spacecraft that has been orbiting and exploring Saturn for over a decade will end its mission in September with a spectacular atmospheric plunge. Pictured here is a diagram of Cassini's remaining orbits, each taking about one week. Cassini is scheduled to complete a few months of orbits that will take it just outside Saturn's outermost ring F. Then, in April, Titan will give Cassini a gravitational pull into Proximal orbits, the last of which, on September 15, will impact Saturn and cause the spacecraft to implode and melt. Cassini's Grand Finale orbits are designed to record data and first-ever views from inside the rings -- between the rings and planet -- as well as some small moons interspersed in the rings. Cassini's demise is designed to protect any life that may occur around Saturn or its moons from contamination by Cassini itself.

terça-feira, 24 de janeiro de 2017

Expressões populares portuguesas - Não poder com uma gata pelo rabo

Afficher l'image d'origine
Significado: 

Ser ou estar muito fraco; estar sem recursos. 

Origem: 

O feminino, neste caso, tem o objectivo de humilhar o impotente ou fraco a que se dirige a referência. Supõe-se que a gata é mais fraca, menos veloz e menos feroz em sua própria defesa do que o gato. Na realidade, não é fácil segurar uma gata pelo rabo, e não deveria ser tão humilhante a expressão como realmente é.

Astronomy picture of the day - 2017 January 24 - M78 and Orion Dust Reflections

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M78 and Orion Dust Reflections 
Image Credit & Copyright: Marco Burali, Tiziano Capecchi, Marco Mancini (MTM observatory, Italy)
Explanation: In the vast Orion Molecular Cloud complex, several bright blue nebulas are particularly apparent. Pictured here are two of the most prominent reflection nebulas - dust clouds lit by the reflecting light of bright embeddedstars. The more famous nebula is M78, in the image center, cataloged over 200 years ago. To its left is the lesser known NGC 2071. Astronomers continue to study these reflection nebulas to better understand how interior stars form. The Orion complex lies about 1500 light-years distant, contains the Orion and Horsehead nebulas, and covers much of the constellation of Orion.

segunda-feira, 23 de janeiro de 2017

Expressões populares portuguesas - Mal e porcamente

Afficher l'image d'origineSignificado: 

Muito mal; de modo muito imperfeito. 

Origem: 

«Inicialmente, a expressão era "mal e parcamente". Quem fazia alguma coisa assim, agia mal e eficientemente, com parcos (poucos) recursos. Como parcamente não era palavra de amplo conhecimento, o uso popular tratou de substituí-la por outra, parecida, bastante conhecida e adequada ao que se pretendia dizer. E ficou " mal e porcamente", sob protesto suíno.»(1) (1) in A Casa da Mãe Joana, de Reinaldo Pimenta, vol. 1 (Editora Campus, Rio de Janeiro)

Grupo Musical Raizes do Alentejo - "Trigueira alentejana" - Slides - Musica

Costa em Hotel Monte das Buganvilias-Zambujeira do Mar
"Trigueira alentejana"

Astronomy picture of the day - 2017 January 23 - Winter Hexagon over Manla Reservoir

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Winter Hexagon over Manla Reservoir 
Image Credit & Copyright: Jeff Dai (TWAN)
Explanation: If you can find Orion, you might be able to find the Winter Hexagon. The Winter Hexagon involves some of the brightest stars visible, together forming a large and easily found pattern in the winter sky of Earth's northern hemisphere. The stars involved can usually be identified even in the bright night skies of a big city, although here they appeared recently in dark skies above the Manla Reservoir in TibetChina. The six stars that compose the Winter Hexagon are AldebaranCapellaCastor (and Pollux), ProcyonRigel, and Sirius. Here, the band of our Milky Way Galaxy runs through the center of the Winter Hexagon, while the Pleiades open star cluster is visible just above. TheWinter Hexagon asterism engulfs several constellations including much of the iconic steppingstone Orion.

domingo, 22 de janeiro de 2017

Expressões populares portuguesas - Ja a formiga tem catarro

Afficher l'image d'origine




Significado: 


Diz-se a quem pretende ser mais do que é, sobretudo dirigido a crianças ou inexperientes. 

Astronomy picture of the day - 2017 January 22 - SpaceX Falcon 9 to Orbit

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SpaceX Falcon 9 to Orbit 
Image Credit & Copyright: Tim ShorttFlorida Today
Explanation: Birds don't fly this high. Airplanes don't go this fast. The Statue of Liberty weighs less. No species other than human can even comprehend what is going on, nor could any human just a millennium ago. The launch of arocket bound for space is an event that inspires awe and challenges description. Pictured here, a SpaceX Falcon 9 V rocket lifted off through a cloud deck from Cape Canaveral, Florida last July to deliver cargo and supplies to theInternational Space Station. From a standing start, the 300,000+ kilogram rocket ship lifted its Dragon Capsule up to circle the Earth, where the outside air is too thin to breathe. Rockets bound for space are now launched from somewhere on Earth about once a week.

sábado, 21 de janeiro de 2017

Astronomy picture of the day - 2017 January 21 - Daphnis the Wavemaker

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Daphnis the Wavemaker 
Image Credit: Cassini Imaging TeamSSIJPLESANASA
Explanation: Plunging close to the outer edges of Saturn's rings, on January 16 the Cassini spacecraft captured this closest yet view of Daphnis. About 8 kilometers across and orbiting within the bright ring system's Keeler gap, the small moon is making waves. The 42-kilometer wide outer gap is foreshortened in the image by Cassini's viewing angle. Raised by the influenced of the small moon's weak gravity as it crosses the frame from left to right, the waves are formed in the ring material at the edge of the gap. A faint wave-like trace of ring material is just visible trailing close behind Daphnis. Remarkable details on Daphnis can also be seen, including a narrow ridge around its equator, likely an accumulation of particles from the ring.

Artigo - Acidente de autocarro em Itália faz pelo menos 16 mortos


Imagem divulgada pelos bombeiros italianosPelo menos 16 pessoas morreram e cerca de 40 ficaram feridas depois de um autocarro que transportava estudantes húngaros, numa auto-estrada no Norte de Itália, se ter incendiado. A informação é avançada pela polícia local neste sábado.

O chefe da brigada de trânsito da cidade de Verona, Girolamo Lacquaniti, disse que a maioria dos passageiros eram estudantes adolescentes e os seus pais.

Lacquaniti afirmou ainda, em declarações à estação de televisão SkyTG 24, que o autocarro resvalou para fora da via nesta noite, nas proximidades de uma saída da auto-estrada.

As imagens de televisão mostram um autocarro tragado pelas chamas.

Publico - Portugal

sexta-feira, 20 de janeiro de 2017

Expressões populares portuguesas - Fazer tijolo

Afficher l'image d'origine
Significado:

Morrer. 

Origem: 

Segundo se diz, existiu um velho cemitério mouro para as bandas das Olarias, Bombarda e Forno do Tijolo. O almacávar, isto é, o cemitério mourisco, alastrava-se numa grande extensão por toda a encosta, lavado de ar e coberto de arvoredo. Após o terramoto de 1755, começando a reedificação da cidade, o barro era pouco para as construções e daí aproveitar-se todo o que aparecesse. O cemitério árabe foi tão amplamente explorado que, de mistura com a excelente terra argilosa, iam também as ossadas para fazer tijolo. Assim, é frequente ouvir-se a expressão popular em frases como esta: 'Daqui a dez anos já eu estou a fazer tijolo '. in 'Dicionário de Expressões Correntes' ; Orlando Neves

Artigo - Obrigado Soares

C’est avec cette une que le quotidien portugais Público rend hommage à “l’homme, l’homme politique, le penseur, le fondateur de la démocratie. Qui a vécu et fait vivre le changement. Il sera présent dans les livres d’Histoire, et ce sera l’histoire de quelqu’un qui n’a jamais baissé les bras”, indique le journal dans les pages de son édition spéciale.

Après le décès à l’âge de 92 ans, samedi 7 janvier, de l’ancien président socialiste Mario Soares, le Portugal est en deuil et les hommages se multiplient.

Mario Soares a connu l’exil, avant de revenir pour participer à l’avènement de la démocratie après la révolution des Oeillets en avril 1974, qui avait conduit à la chute de la dictature salazariste. Il a travaillé à la sortie de l’isolement du Portugal, puis à l’intégration européenne du pays. Il a été le fondateur du Parti socialiste portugais, ministre des Affaires étrangères, deux fois chef de gouvernement, président de la République de 1986 à 1996, et député européen.


Courrier International - France

Astronomy picture of the day - 2017 January 20 - Layer Cake Sunset

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Layer Cake Sunset 
Image Credit & CopyrightYuri Beletsky (Carnegie Las Campanas ObservatoryTWAN)
Explanation: On January 18 a tantalizing sunset was captured in this snapshot. Seemingly sliced into many horizontal layers the Sun shimmered moments before it touched the horizon, setting over the Pacific Ocean as seen from themountaintop Las Campanas Observatory in Chile. Pink hues of filtered sunlight were created by the long sight-line through the hazy atmosphere. But the remarkable layers correspond to low atmospheric layers of sharply different temperature and density also along the line of sight. Over a long path through each layer the rays of sunlight are refracted strongly and create different images or mirages of sections of the setting Sun.

quinta-feira, 19 de janeiro de 2017

Sonia Cortez - "Do fundo da alma" - Video - Musica

Foto de perfil de Sonia Cortez III
"Do fundo da alma"

Astronomy picture of the day - 2017 January 19 - The Elephant's Trunk Nebula in Cepheus

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The Elephant's Trunk Nebula in Cepheus 
Image Credit & CopyrightStephen Leshin
Explanation: Like an illustration in a galactic Just So Story, the Elephant's Trunk Nebula winds through the emission nebula and young star cluster complex IC 1396, in the high and far off constellation of Cepheus. Also known as vdB 142, the cosmic elephant's trunk is over 20 light-years long. This colorful close-up view includes image data from a narrow band filter that transmits the light from ionized hydrogen atoms in the region. The resulting composite highlights the bright swept-back ridges that outline pockets of cool interstellar dust and gas. Such embedded, dark, tendril-shaped clouds contain the raw material for star formation and hide protostars within. Nearly 3,000 light-years distant, the relatively faint IC 1396 complex covers a large region on the sky, spanning over 5 degrees. This dramatic scene spans a 1 degree wide field, about the size of 2 Full Moons.

quarta-feira, 18 de janeiro de 2017

Expressões populares portuguesas - Fila Indiana


Afficher l'image d'origineSignificado:

Enfiada de pessoas ou coisas dispostas uma após outra.

Origem:

Forma de caminhar dos índios da América que, deste modo, tapavam as pegadas dos que iam na frente.

Ronda dos Quatro Caminhos/Grupo de Campo Maior/Orquestra Sinfonieta/Coros do Alentejo - "Saias raianas" - Video - Musica - Ao vivo

Afficher l'image d'origine
"Saias raianas"

Astronomy picture of the day - 2017 January 18 - Space Station Vista: Planet and Galaxy

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Space Station Vista: Planet and Galaxy 
Image Credit: NASAJSCESRS
Explanation: If you could circle the Earth aboard the International Space Station, what might you see? Some amazing vistas, one of which was captured in this breathtaking picture in mid-2015. First, visible at the top, are parts of thespace station itself including solar panels. Just below the station is the band of our Milky Way Galaxy, glowing with the combined light of billions of stars, but dimmed in patches by filaments of dark dust. The band of red light just below the Milky Way is airglow -- Earth's atmosphere excited by the Sun and glowing in specific colors of light. Green airglow is visible below the red. Of course that's our Earth below its air, with the terminator between day and night visible near the horizon. As clouds speckle the planet, illumination from a bright lightning bolt is seen toward the lower right. Between work assignments, astronauts from all over the Earth have been enjoying vistas like this from the space station since the year 2000.

terça-feira, 17 de janeiro de 2017

Astronomy picture of the day - 2017 January 17 - Fly Me to the Moon

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Fly Me to the Moon 
Image Credit & Copyright: Tamas Ladanyi (TWAN)
Explanation: No, this is not a good way to get to the Moon. What is pictured is a chance superposition of an airplane and the Moon. The contrail would normally appear white, but the large volume of air toward the setting Sun preferentially knocks away blue light, giving the reflected trail a bright red hue. Far in the distance, to the right of the plane, is the young Moon. This vast world shows only a sliver of itself because the Sun is nearly lined up behind it. Captured two weeks ago, the featured image was framed by an eerie maroon sky, too far from day to be blue, too far from night to be black. Within minutes the impromptu sky show ended. The plane crossed the Moon. The contrail dispersed. The Sun set. The Moon set. The sky faded to black, only to reveal thousands of stars that had been too faint to see through the rustic red din.

segunda-feira, 16 de janeiro de 2017

Expressões populares portuguesas - Andar à toa


Afficher l'image d'origine

Significado:

Andar sem destino, despreocupado, passando o tempo. 

Origem: 

Toa é a corda com que uma embarcação reboca a outra. Um navio que está "à toa" é o que não tem leme nem rumo, indo para onde o navio que o reboca determinar.

Playing For Change - "Honky tonk women" - Video - Music

Afficher l'image d'origine
"Honky tonk women"

Astronomy picture of the day - 2017 January 16 - Geostationary Highway through Orion

Geostationary Highway through Orion 
Image Credit & Copyright: James A. DeYoung
Explanation: Put a satellite in a circular orbit about 42,000 kilometers from the center of the Earth and it will orbit once in 24 hours. Because that matches Earth's rotation period, it is known as a geosynchronous orbit. If that orbit is also in the plane of the equator, the satellite will hang in the sky over a fixed location in a geostationary orbit. As predicted in the 1940s by futurist Arthur C. Clarke, geostationary orbits are in common use for communication and weather satellites, a scenario now well-known to astroimagers. Deep images of the night sky made with telescopes that follow the stars can also pick up geostationary satellites glinting in sunlight still shining far above the Earth's surface. Because they all move with the Earth's rotation against the background of stars, the satellites leave trails that seem to follow a highway across the celestial landscape. The phenomenon was captured last month in this video showingseveral satellites in geostationary orbit crossing the famous Orion Nebula.

domingo, 15 de janeiro de 2017

Expressões populares portuguesas - Embandeirar em arco


Significado: Manifestação efusiva de alegria.

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Origem: Na Marinha, em dias de gala ou simplesmente festivos, os navios embandeiram em arco, isto é, içam pelas adriças ou cabos (vergueiros) de embandeiramento galhardetes, bandeiras e cometas quase até ao topo dos mastros, indo um dos seus extremos para a proa e outro para a popa. Assim são assinalados esses dias de regozijo ou se saúdam outros barcos que se manifestam da mesma forma.

Imagenes del Mundo - Desiertos más curiosos de la Tierra - Bryce Canyon - Utah - Estados Unidos

Desiertos curiosos
123rf
Una formación natural impresionante. Bryce Canyon, en el estado de Utah

Astronomy picture of the day - 2017 January 15 - The Matter of the Bullet Cluster

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The Matter of the Bullet Cluster 
Image Credit: X-ray: NASA/CXC/CfA/ M. Markevitch et al.;
Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/ D.Clowe et al.
Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.
Explanation: What's the matter with the Bullet Cluster? This massive cluster of galaxies (1E 0657-558) creates gravitational lens distortions of background galaxies in a way that has been interpreted as strong evidence for the leading theory: that dark matter exists within. Different recent analyses, though, indicate that a less popular alternative -- modifying gravity-- could explain cluster dynamics without dark matter, and provide a more likely progenitor scenario as well. Currently, the two scientific hypotheses are competing to explain the observations: it's invisible matter versus amended gravity. The duel is dramatic as a clear Bullet-proof example of dark matter would shatter the simplicity ofmodified gravity theories. For the near future, the battle over the Bullet cluster is likely to continue as new observations, computer simulations, and analyses are completed. The featured image is a Hubble/Chandra/Magellan composite with red depicting the X-rays emitted by hot gas, and blue depicting the suggested separated dark matter distribution.

sábado, 14 de janeiro de 2017

Artigo - Nuvem espetacular fotografada na Austrália


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Uma passageira a bordo de um avião com destino a Adelaide, na Austrália, conseguiu fotografar um momento que nos consegue levar até às nuvens, literalmente. Ilya Katsman, de 22 anos, conseguiu captar uma nuvem espetacular, no mínimo invulgar, através da janela do avião em que se viajava, dá conta a BBC.
Neil Bennett, do Instituto de Meteorologia da Austrália, revela que é provável estarmos perante uma wave cloud – onda nuvem -, criada por ondas atmosféricas. “É como fazer deslizar uma pedra num lago. O ar está a ir para cima e para baixo como se fosse um movimento de uma onda”, afirma Bennett.
Perante este fenómeno que não se vê todos os dias, as fotos tiradas pela passageira de 22 anos chamaram a atenção e despertaram interesse a muitos curiosos depois de terem sido divulgadas na página de Facebook da companhia aérea.
Observador - Portugal

Astronomy picture of the day - 2017 January 14 - Stardust in the Perseus Molecular Cloud

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Stardust in the Perseus Molecular Cloud 
Image Credit & CopyrightLorand Fenyes
Explanation: Clouds of stardust drift through this deep skyscape. The cosmic scene spans nearly 2 degrees across the Perseus molecular cloud some 850 light-years away. A triangle of dusty nebulae reflecting light from embedded stars is captured in the telescopic field of view. With a characteristic bluish color reflection nebula NGC 1333 is at left, vdB13 at bottom right, and rare yellowish reflection nebula vdB12 lies at the top. Stars are forming in the Perseus molecular cloud, though most are obscured at visible wavelengths by the pervasive dust. Still, hints of contrasting red emission from Herbig-Haro objects, the jets and shocked glowing gas emanating from recently formed stars, are evident in NGC 1333. At the estimated distance of the molecular cloud, legs of the triangle formed by the reflection nebulae would be about 20 light-years long.

sexta-feira, 13 de janeiro de 2017

Astronomy picture of the day - 2017 January 13 - When Mars met Neptune

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When Mars met Neptune 
Image Credit & CopyrightStephen Mudge
Explanation: On January 1, a Mars-assisted viewing opportunity allowed binocular-equipped skygazers to cross an ice giant off their life list. Remarkably, the line-of-sight to the bright Red Planet could guide you to within 0.02 degrees of a faint, pale Neptune in Earth's night skies. Taken within 3 hours of their closest conjunction, these panels capture the odd couple's appearance in skies over Brisbane, Australia. A wide field view includes the new year'sslender crescent moon near the western horizon and Venus as the brilliant evening star. Mars and Neptune are indicated at the upper right. The two inset magnified views were taken with the same telephoto lens and so do show the Mars-Neptune conjunction and the apparent size of the crescent moon at the same scale. This week Neptune hangs out near Venus on the western sky.

quinta-feira, 12 de janeiro de 2017

Astronomy picture of the day - 2017 January 12 - Edge-On NGC 891

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Edge-On NGC 891
Image Credit & Copyright: Alessandro Falesiedi
Explanation: Large spiral galaxy NGC 891 spans about 100 thousand light-years and is seen almost exactly edge-on from our perspective. In fact, about 30 million light-years distant in the constellation Andromeda, NGC 891 looks a lot like our Milky Way. At first glance, it has a flat, thin, galactic disk of stars and a central bulge cut along the middle by regions of dark obscuring dust. But remarkably apparent in NGC 891's edge-on presentation are filaments of dust that extend hundreds of light-years above and below the center line. The dust has likely been blown out of the disk by supernova explosions or intense star formation activity. Fainter galaxies can also be seen near the edge-on disk in this deep portrait of NGC 891.

quarta-feira, 11 de janeiro de 2017

Astronomy picture of the day - 2017 January 11 - Mimas, Crater, and Mountain

2017 January 11
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Mimas, Crater, and Mountain
Image Credit: Cassini Imaging TeamSSIJPLESANASA
Explanation: Mimas is an icy, crater-pocked moon of Saturn a mere 400 kilometers (250 miles) in diameter. Its largest crater Herschel is nearly 140 kilometers wide. About a third the diameter of Mimas itself, Herschel crater gives the small moon an ominous appearance, especially for scifi fans of the Death Star battlestation of Star Wars fame. In fact, only a slightly bigger impact than the one that created such a large crater on a small moon could have destroyed Mimas entirely. In this Cassini image from October 2016, the anti-Saturn hemisphere of the synchronously rotating moon is bathed in sunlight, its large crater near the right limb. Casting a long shadow across the crater floor, Herschel's central mountain peak is nearly as tall as Mount Everest on planet Earth.

terça-feira, 10 de janeiro de 2017

Astronomy picture of the day - 2017 January 10 - Sentinels of a Northern Sky

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Sentinels of a Northern Sky 
Image Credit & Copyright: Pierre Destribats
Explanation: Who guards the north? The featured picture was taken last March in Finnish Lapland where weather can include sub-freezing temperatures and driving snow. Surreal landscapes sometimes result, where white alien-looking sentinels seem to patrol the landscape. In actuality though, the aliens are snow-covered trees, and the red hut they seem to be guarding is an outhouse. Far in the distance, behind this uncommon Earthly vista, is a beautiful night sky which includes a green aurora, bright stars, and streaks of orbiting satellites. Of course, in the spring, the trees thaw and Lapland looks much different.

segunda-feira, 9 de janeiro de 2017

Astronomy picture of the day - 2017 January 9 - In the Center of Spiral Galaxy NGC 5033

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In the Center of Spiral Galaxy NGC 5033 
Image Credit: NASAESAHubbleMAST - Processing: Judy Schmidt
Explanation: What's happening in the center of spiral NGC 5033? Many things -- some circular, some energetic, and some not well understood. NGC 5033 is known as a Seyfert galaxy because of the great activity seen in its nucleus. Bright stars, dark dust, and interstellar gas all swirl quickly around a galactic center that appears slightly offset from a supermassive black hole. This offset is thought to be the result of NGC 5033 merging with another galaxy sometime in the past billion years. The featured image was taken by the Hubble Space Telescope in 2005. NGC 5033 spans about 100,000 light years and is so far away that we see it only as it existed about 40 million years ago.

domingo, 8 de janeiro de 2017

Artigo - Morreu o antigo presidente da República Mário Soares

Morreu o antigo presidente da República Mário Soares
O antigo Presidente da República Mário Soares morreu no sabado aos 92 anos, disse à agência Lusa fonte do Hospital da Cruz Vermelha.

Mário Soares, que foi ainda fundador e líder do PS, assim como ministro dos Negócios Estrangeiros e primeiro-ministro, morreu hoje, aos 92 anos, no Hospital da Cruz Vermelha, em Lisboa, onde estava internado desde 13 de dezembro de 2016.

Filho de João Lopes Soares, um ministro na I República, e de Elisa Nobre Baptista, Mário Alberto Nobre Lopes Soares nasceu a 07 de dezembro de 1924, em Lisboa, tendo estado omnipresente na vida pública do país, tanto nas décadas anteriores à revolução de 25 de Abril de 1974, como nos primeiros 40 anos da democracia portuguesa.

Preso político e posteriormente exilado em São Tomé e Príncipe e França durante a ditadura, Soares regressou "em ombros" à sua pátria em 1974 para desempenhar as pastas dos Negócios Estrangeiros dos primeiros governos provisórios, liderar os I, II e IX Governos Constitucionais (1976-78 e 1983-85), até chegar à Presidência da República, no Palácio de Belém, onde ficaria por dois mandatos (1986-1996).

Manuel Resendes c/Lusa

sábado, 7 de janeiro de 2017

Astronomy picture of the day - 2017 January 7 - Sharpless 249 and the Jellyfish Nebula

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Sharpless 249 and the Jellyfish Nebula 
Image Credit & Copyright: Eric Coles
Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic mosaic. The scene is anchored below by bright star Eta Geminorum, at the foot of the celestial twin, while the Jellyfish Nebula is the brighter arcing ridge of emission with tentacles dangling below and left of center. In fact, the cosmic jellyfish is part of bubble-shaped supernova remnant IC 443, the expanding debris cloud from a massive star that exploded. Light from the explosion first reached planet Earth over 30,000 years ago. Like its cousin in astrophysical waters the Crab Nebula supernova remnant, the Jellyfish Nebula is known to harbor a neutron star, the remnant of the collapsed stellar core. An emission nebula cataloged as Sharpless 249 fills the field at the upper right. The Jellyfish Nebula is about 5,000 light-years away. At that distance, this narrowband composite image presented in the Hubble Palette would be about 300 light-years across.