"Chapéu preto"
2015-11-11
2015-11-10
Astronomy picture of the day - 2015 November 10 - AE Aurigae and the Flaming Star Nebula
Image Credit & Copyright: Jesús Vargas (Sky-Astrophotography) & Maritxu Poyal (Maritxu)
Explanation: Is star AE Aurigae on fire? No. Even though AE Aurigae is named the flaming star, the surrounding nebula IC 405 is named the Flaming Star Nebula, and the region appears to have the color of fire, there is no fire. Fire, typically defined as the rapid molecular acquisition of oxygen, happens only when sufficient oxygen is present and is not important in such high-energy, low-oxygen environments such as stars. The material that appears as smoke is mostly interstellar hydrogen, but does contain smoke-like dark filaments of carbon-rich dust grains. The bright star AE Aurigae, visible toward the right near the nebula's center, is so hot it is blue, emitting light so energetic it knockselectrons away from surrounding gas. When a proton recaptures an electron, light is emitted, as seen in the surrounding emission nebula. Pictured above, the Flaming Star nebula lies about 1,500 light years distant, spans about 5 light years, and is visible with a small telescope toward the constellation of the Charioteer (Auriga).
Fotos - "Inicio de Primavera" - Aufrery - 14-04-2015
"Inicio de Primavera"
Aufrery, 14-04-2015
JoanMira
2015-11-09
As 3 fases importantes do percurso legislativo de Peter Steps Rabbit
Ao principio
Orando ja perto do fim
E... finalmente!
Imagens - Curiosidades - Salamandra gigante da China
Existem criaturas no mundo cuja existência é quase inimaginavel. São seres realmente bizarros, com características incomuns e que chamam a atenção.
Fotos - "Apenas uma impressão" - Bordeaux - Jardin Public - 07-10-2015
"Apenas uma impressão"
Bordeaux - Jardin Public
JoanMira
Astronomy picture of the day - 2015 November 9 - Assembly of The International Space Station (video)
Animation Credit: NASA's Johnson Space Center
Explanation: It is the largest and most sophisticated object ever built off the Earth. It has taken numerous spaceflights and over a decade to construct. The International Space Station (ISS) is currently the premiere habitat for humans in Earth orbit, and an amalgamation of sophisticated orbiting laboratories that have examined everything from the formation of new materials and medicines created in microgravity -- to the limitations of the human body -- to thecomposition of the universe. This month, the ISS is celebrating 15 years of continuous human habitation. The ISS has been visited by astronauts from 15 countries, so far, and has international partners led by NASA (USA), Roscosmos(Russia), CSA (Canada), JAXA (Japan), and ESA (Europe). The featured animation shows the piece-by-piece construction of the ISS from 1998 to 2011. Spanning the length of a football field, the ISS can be seen as an unusuallybright spot drifting slowly overhead by anyone who knows when and where to look.
2015-11-08
Astronomy picture of the day - 2015 November 8 - A Quadruple Sky Over Great Salt Lake
Image Credit & Copyright: Michael Wilson
Explanation: This was a sky to show the kids. All in all, three children, three planets, the Moon, a star, an airplane and a mom were all captured in one image near Great Salt Lake in Utah, USA in early September of 2005. Minus the airplane and the quadruple on the ground, this busy quadruple coincidence sky was visible last week all over the world. The easiest object to spot is the crescent Moon, which is easily the brightest sky orb in the featured image. Venusis the highest planet in the sky, with Jupiter to its right. The bright star Spica completes the quadruple just below Venus. The streak on the far right is an airplane. Mom is seated. Grandpa, appreciating the beauty of the moment, took the picture. This week, the pre-dawn sky shows a similar conjunction of planets.
2015-11-07
Imagens do Mundo - Biarritz - França - 25° à sombra...
Duas pessoas tomam banho de sol numa praia de Biarritz (França) onde a temperatura de 25 ° nesta época do ano é inabitual.
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