2015-02-04
Imagens do Mundo - Verde burbujeante (Champagne Pool, Nueva Zelanda)
Verde burbujeante (Champagne Pool, Nueva Zelanda)
Las emanaciones de CO2 que surgen de las profundidaes de este lago recordaron a alguien las burbujas que bailan en una copa de champán. De ahí su nombre: Champagne Pool (piscina de champán). Eso sí, en lugar de estar fresquito como un cava listo para brindar, la temperatura del agua supera los 70ºC. El lago está situado en la isla Norte de Nueva Zelanda, en Wai-o-tapu, una zona de actividad volcánica y geotermal.
Astronomy picture of the day - 04-02-2015 - Stars, Sprites, Clouds, Auroras
Image Credit & Copyright: Mike Hollingshead (Extreme Instability)
Explanation: What are those red streaks in the sky? While photographing unexpected auroras over a distant thunderstorm, something extraordinary happened: red sprites. This brief instance of rarely imaged high-altitude lightning flashed so bright that it was witnessed by several people independently. Pictured over Minnesota, USA in May 2013, these red sprites likely followed an extremely powerful low-altitude conventional lightning bolt. Captured in thefeatured frame are a house and electrical pole in the foreground, thick clouds in the lower atmosphere, a lightning storm on the horizon, distant red sprites and green aurora in the upper atmosphere, and distant stars from our local neighborhood of the Milky Way Galaxy. The spectacular image is thought to be only the second known case of sprites and auroras photographed together, and possibly the first in true color.
2015-02-03
Imagens do Mundo - "Gelo" - Marktoberdorf - Alemanha
Detalle de unos carámbanos de hielo en Marktoberdorf, al sur de Alemania.
Imagens do Mundo - "A arvore e a neve" - Bogen - Alemanha
Un árbol es fotografiado en un campo cubierto de nieve cerca de la ciudad bávara de Bogen, en el sur de Alemania.
Imagens do Mundo - Inundações em Dalgopol (Bulgaria)
Vista aérea de la ciudad de Dalgopol (Bulgaria) tras las lluvias caídas en la zona.
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Astronomy picture of the day - 03-02-2015 - Jets from Comet Churyumov-Gerasimenko
Image Credit: ESA / Rosetta / MPS for OSIRIS Team; MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
Explanation: Where do comet tails come from? Although it is common knowledge that comet tails and comas originate from comet nuclei, exactly how that happens is an active topic of research. One of the best images yet of emerging jets is shown in the featured image, taken last November by the robotic Rosetta spacecraft in orbit around the Comet 67P/Churyumov-Gerasimenko (Comet CG), and released last month. The overexposed picture shows plumes of gas and dust escaping numerous places from the Comet CG's nucleus as it nears the Sun and heats up. Although Comet CG is currently further out from the Sun than Mars, its orbit will take it almost as close as the Earth this coming August, at which time its jet activity is expected to increase by a factor of about 100. You've likely seen some debris from comet nuclei before but in another form -- when sand-sized bits end their journey through the Solar System by impacting the atmosphere of Earth as meteors.
2015-02-02
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