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2016-03-25

Fotos JoanMira - "Sol e sombra" - Barreiro, 18-11-2011

"Sol e sombra"

Barreiro, 18-11-2011

JoanMira

Astronomy picture of the day - 2016 March 25 - Close Comet and the Milky Way

See Explanation.
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Clicking on the image will bring up the highest resolution version
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Close Comet and the Milky Way
Image Credit & Copyright: Alex Cherney (Terrastro, TWAN)

Explanation: Comet 252P/Linear's lovely greenish coma is easy to spot in this expansive southern skyscape. Visible to the naked eye from the dark site near Flinders, Victoria, Australia, the comet appears tailless. Still, its surprisingly bright coma spans about 1 degree, posed here below the nebulae, stars, and dark rifts of the Milky Way. The five panels used in the wide-field mosaic were captured after moonset and before morning twilight on March 21. That was less than 24 hours from the comet's closest approach, a mere 5.3 million kilometers from our fair planet. Sweeping quickly across the sky because it is so close to Earth, the comet should be spotted in the coming days by northern hemisphere comet watchers. In predawn but moonlit skies it will move through Sagittarius and Scorpius seen toward the southern horizon. That's near the triangle formed by bright, yellowish, Mars, Saturn, and Antares at the upper leftof this frame.

Johan Cruyff est mort. Chapeau, Monsieur.

Johan Cruyff est mort ce jeudi à Barcelone à l’âge de 68 ans, entouré de ses amis et de ses proches. Joueur de génie, figure de proue du légendaire Ajax du tournant des années 1970, symbole du «football total» néerlandais de cette époque, entraîneur boulimique de titres, théoricien dont les préceptes s’appliquent aujourd’hui encore dans les plus grands clubs de la planète… Rares sont ceux qui peuvent revendiquer une plus grande influence sur le football depuis sa création à la fin du XIXe siècle.

Né le 25 avril 1947 à Amsterdam dans une famille modeste, Johan Cruyff a grandi à quelques pas du stade de l’Ajax, De Meer. Entré au club à l’âge de 10 ans, il fait déjà partie de l’équipe première quand, alors qu’il n’a que 17 ans, un certain Rinus Michels devient entraîneur, en 1965. Ensemble, les deux hommes vont révolutionner le foot. L’Ajax remporte six fois le Championnat, quatre fois la Coupe et surtout trois fois d’affilée la Coupe d’Europe des clubs champions.

L'Equipe - France

2016-03-24

Fotografia - Saul Leiter - Reflets de vie

Pour comprendre l’univers si particulier du photographe américain Saul Leiter, il faut aimer les reflets des vies dans les flaques du temps, les buées qui montent parfois des gens, toutes les histoires d’un jour que l’on pourrait imaginer à partir de ses photos.

Astronomy picture of the day - 2016 March 24 - Hickson 91 in Piscis Austrinus

See Explanation. Clicking on the picture will download
the highest resolution version available.

Hickson 91 in Piscis Austrinus
Image Credit & Copyright: CHART32 Team, Processing - Johannes Schedler

Explanation: Scanning the skies for galaxies, Canadian astronomer Paul Hickson and colleagues identified some 100 compact groups of galaxies, now appropriately called Hickson Compact Groups (HCGs). This sharp telescopic image captures one such galaxy group, HCG 91, in beautiful detail. The group's three colorful spiral galaxies at the center of the field of view are locked in a gravitational tug of war, their interactions producing faint but visible tidal tails over 100,000 light-years long. Their close encounters trigger furious star formation. On a cosmic timescale the result will be a merger into a large single galaxy, a process now understood to be a normal part of the evolution of galaxies, including our own Milky Way. HCG 91 lies about 320 million light-years away in the constellation Piscis Austrinus. But the impressively deep image also catches evidence of fainter tidal tails and galaxy interactions close to 2 billion light-years distant.

2016-03-23

Fotos - "Pista de aviação" - Baracoa, Cuba, 26-10-2010

"Pista de aviação"

Baracoa, Cuba, 26-10-2010

JoanMira

Astronomy picture of the day - 2016 March 23 - The Great Nebula in Carina

The Great Nebula in Carina
Image Credit & Copyright: Damian Peach/SEN

Explanation: In one of the brightest parts of Milky Way lies a nebula where some of the oddest things occur. NGC 3372, known as the Great Nebula in Carina, is home to massive stars and changing nebulas. The Keyhole Nebula(NGC 3324), the bright structure just above the image center, houses several of these massive stars and has itself changed its appearance. The entire Carina Nebula spans over 300 light years and lies about 7,500 light-years away in the constellation of Carina. Eta Carinae, the most energetic star in the nebula, was one of the brightest stars in the sky in the 1830s, but then faded dramatically. Eta Carinae is the brightest star near the image center, just left of theKeyhole Nebula. While Eta Carinae itself maybe on the verge of a supernova explosion, X-ray images indicate that much of the Great Carina Nebula has been a veritable supernova factory.

Foto : JoanMira