Margens do Douro
2017-10-25
Astronomy picture of the day - 2017 October 25 - Marius Hills and a Hole in the Moon
Image Credit: NASA, Lunar Orbiter 2; Inset: Lunar Reconnaissance Orbiter
Explanation: Could humans live beneath the surface of the Moon? This intriguing possibility was bolstered in 2009 when Japan's Moon-orbiting SELENE spacecraft imaged a curious hole beneath the Marius Hills region on the Moon, possibly a skylight to an underground lava tube. Follow-up observations by NASA's Lunar Reconnaissance Orbiter (LRO) indicated that the Marius Hills Hole (MHH) visually extends down nearly 100 meters and is several hundred meters wide. Most recently, ground penetrating radar data from SELENE has been re-analyzed to reveal a series of intriguing second echoes -- indicators that the extensive lava tubes exist under Marius Hills might extend down even kilometers and be large enough to house cities. Such tubes could shelter a future Moon colony from large temperature swings, micro-meteor impacts, and harmful solar radiation. Potentially, underground lava tubes might even be sealed to contain breathable air. These lava tubes likely formed when lunar volcanos were active billions of years ago. Pictured, the surface of Marius Hills region was captured in the 1960s by NASA's Lunar Orbiter 2 mission, while an inset image of the MHH is shown from NASA's continuing LRO. Several volcanic domes are visible, while Marius Crater is visible on the upper right.
2017-10-24
Artigo - “Todos falam da pequena nação marítima”: Portugal entre os países a visitar em 2018
A Lonely Planet, maior editora do mundo de guias de viagem coloca o nosso país como um destino que deve ser incluído na rota de qualquer viajante em 2018.
A Lonely Planet, editora de guia de viagens, é uma referência mundial para milhões de viajantes e a sua lista de tendências de viagem é seguida ‘religiosamente’ por quem adora viajar.
A viver um ‘boom’ sem precedentes na área do turismo, Portugal foi agora colocado numa restrita lista de dez países que devem ser visitados em 2018.
Na lista, o nosso país é destacado como “um centro dinâmico de arte, cultura e cozinha”, acessível em termos económicos e repleto de “maravilhas naturais”. Assim, e no entender da Lonely Planet, não é por acaso que “todos falam da pequena nação marítima”.
Economico - Portugal
Astronomy picture of the day - 2017 October 24 - Haumea of the Outer Solar System
Illustration Credit: Instituto de Astrofísica de Andalucía
Explanation: One of the strangest objects in the outer Solar System has recently been found to have a ring. The object, named Haumea, is the fifth designated dwarf planet after Pluto, Ceres, Eris, and Makemake. Haumea's oblong shape makes it quite unusual. Along one direction, Haumea is significantly longer than Pluto, while in another direction Haumea has an extent very similar to Pluto, while in the third direction is much smaller. Haumea's orbit sometimes brings it closer to the Sun than Pluto, but usually Haumea is further away. Illustrated above, an artist visualizes Haumea as a cratered ellipsoid surrounded by a uniform ring. Originally discovered in 2003 and given the temporary designation of 2003 EL61, Haumea was renamed in 2008 by the IAU for a Hawaiian goddess. Besides the ring discovered this year, Haumea has two small moons discovered in 2005, named Hi'iaka and Namaka for daughters of the goddess.
2017-10-23
Artigo - Outra vez (5) - Cristiano Ronaldo The best !
Cristiano Ronaldo é o melhor jogador do Mundo de 2017 para a FIFA.
O internacional português foi distinguido em Londres, na gala The Best.
O avançado do Real Madrid renova assim o título, que conquistou em 2016.
Cristiano Ronaldo vence pela quinta vez a distinção da FIFA, que durante vários anos foi em conjunto com a France Football, que atribui a Bola de Ouro.
Lionel Messi e Neymar Jr eram os outros nomeados.
O internacional português foi o melhor do mundo em 2017, 2016, 2014, 2013 e 2008. Refira-se que em 2008, ainda no Manchester United, o galardão era relativo a FIFA World Player of The Year.
Mais Futebol - Portugal
Imagenes del mundo - Clipper Race - Ciudad del Cabo (Sudáfrica)
El yate Sanya Serenity Coast navega hacia Ciudad del Cabo para completar la segunda ronda de la regata mundial Clipper Race en Cuidad del Cabo (Sudáfrica). La Clipper Race es una regata alrededor del mundo en la que competidores aficionados de 41 países harán 40.000 millas náuticas.
Imagenes del mundo - Hanóver (Alemania)
Los primeros rayos de luz aparecen al amanecer entre un paseo de tilos de Hanóver (Alemania).
HOLGER HOLLEMANN AP
Astronomy picture of the day - 2017 October 23 - NGC 4993: The Galactic Home of an Historic Explosion
Image Credit: NASA & ESA
Explanation: That reddish dot -- it wasn't there before. It's the dot to the upper left of galaxy NGC 4993's center, do you see it? When scanning the large field of possible locations of an optical counterpart to the unprecedentedgravitational wave event GW170817 in August, the appearance of this fading dot quickly became of historic importance. It pinpointed GW170817's exact location, thereby enabling humanity's major telescopes to examine the first everelectromagnetic wave counterpart to a gravitational wave event, an event giving strong evidence of being a short gamma-ray burst kilonova, the element-forming explosion that occurs after two neutron stars merge. The featured image oflenticular galaxy NGC 4993 by Hubble shows the fading dot several days after it was discovered. Analyses, continuing, include the physics of the explosion, what heavy elements formed, the similarity of the speeds of gravitational radiation and light, and calibrating a new method for determining the distance scale of our universe.
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