1 - WORLD - JoanMira

2014-09-10

Foto - Barreiro - Tejo - 09-09-2014

Tejo - Barreiro

09-09-2014

JoanMira

2014-09-09

Astronomy picture of the day 09-09-2014 - An Aurora Cupcake with a Milky Way Topping

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An Aurora Cupcake with a Milky Way Topping
Image Credit &Copyright:Göran Strand

Explanation: This sky looked delicious.Double auroral ovals were captured above the town lights of Östersund, Sweden, last week.Pictured above, the green ovals occurred lower to the ground than violet aurora rays above, making the whole display look a bit like a cupcake. To top it off, far in the distance, the central band or our Milky Way Galaxy slants down from the upper left. The auroras were caused by our Sun ejecting plasma clouds into the Solar System just a few days before, ionized particles that subsequently impacted the magnetosphere of the Earth. Aurora displays may continue this week as an active sunspot group rotated into view just a few days ago.

2014-09-03

Imagens do Mundo - Colibri - Colômbia

Un colibrí vuela en un jardín en Pereira (Colombia), el 20 de agosto de 2014.

Imagens do Mundo - Vulcão Bardarbunga - Islândia

La erupción originada al norte del volcán islandés Bardarbunga, situado bajo el glaciar Vatnajökull, continúa a "nivel estable" 48 horas después de su estallido.

Astronomy picture of the day 03-09-2014 - Airglow Ripples over Tibet

Airglow Ripples over Tibet
Image Credit &Copyright: Jeff Dai
Explanation: Why would the sky look like a giant target? Airglow. Following a giant thunderstorm over Bangladesh in late April, giant circular ripples of glowing air appeared over Tibet, China, as pictured above. The unusual pattern is created by atmospheric gravity waves, waves of alternating air pressure that can grow with height as the air thins, in this case about 90 kilometers up. Unlike auroras powered by collisions with energetic charged particles and seen at high latitudes, airglow is due to chemiluminescence, the production of light in a chemical reaction. More typically seen near the horizon, airglow keeps the night sky from ever being completely dark.

2014-08-31

Foto - Silves - Escola Industrial e Comercial - 19-11-2011

Silves - Escola Industrial e Comercial.

Construida em 1957 por Antonio Luiz de Oliveira e Mira, "pai do filho", aqui na fotografia.

Na altura ainda se endireitavam pregos. que o digam os meus dedinhos... Era escola de manhã - ali ao lado mesmo (Professor Verdasca) - e a "obra" na parte da tarde... E sobrava tempo ainda para para fazer asneiras... Viva Silves!

19-10-2011

JoanMira