12 janeiro 2017

Edge On NGC 891


Large spiral galaxy NGC 891 spans about 100 thousand light-years and is seen almost exactly edge-on from our perspective. In fact, about 30 million light-years distant in the constellation Andromeda, NGC 891 looks a lot like our Milky Way. At first glance, it has a flat, thin, galactic disk of stars and a central bulge cut along the middle by regions of dark obscuring dust. But remarkably apparent in NGC 891's edge-on presentation are filaments of dust that extend hundreds of light-years above and below the center line. The dust has likely been blown out of the disk by supernova explosions or intense star formation activity. Fainter galaxies can also be seen near the edge-on disk in this deep portrait of NGC 891. (Editor's Note: The NGC 891 image used in today's APOD posting has been replaced and the credit corrected to indicate the author of the original work.)

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Raias escuras em Vênus poderiam ser micróbios alienígenas

Os cientistas estão ansiosos para lançar uma missão a Vênus para investigar as misteriosas faixas escuras em suas nuvens.

Com sua extrema temperatura superficial e pressão atmosférica esmagadora, Vênus pode parecer o último lugar para procurar a vida extraterrestre dentro de nosso próprio sistema solar.

Uma série de misteriosos traços escuros observados na atmosfera do planeta, no entanto, tem levado alguns cientistas a acreditarem que poderia ser evidência de organismos microbianos.

Tanto a Rússia quanto os EUA esperam juntar forças para lançar uma nova missão exploratória a Vênus para ajudar a desvendar os segredos deste mundo misterioso, bem como para investigar a possibilidade de que essas estranhas sombras talvez sejam o lar dos primeiros exemplos conhecidos de vida extraterrestre.

Tal missão, que inclui um orbitador e uma sonda, poderia ser lançada em 2025.

“Eu não posso dizer que há vida microbiana nas nuvens de Vênus”, disse o cientista atmosférico Sanjay Limaye da Universidade de Wisconsin. “Mas isso não significa que não estejam lá também”.

“A única maneira de aprender é ir lá e provar a atmosfera.”



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Telescópio chileno vai ajudar a caçar vida alienígena

O Very Large Telescope (VLT) no Chile estará em breve em busca de mundos habitáveis ??em torno de Alpha Centauri.

Operado pelo Observatório Europeu do Sul, o famoso telescópio terrestre está sendo preparado para receber uma atualização de hardware que lhe permitirá observar diretamente os planetas em órbita em torno das estrelas do Alpha Centauri, nosso sistema vizinho mais próximo.

A atualização, que levará alguns anos para ser concluída, se concentrará no instrumento VISIR do telescópio, uma ferramenta de imagem capaz de observar objetos celestes por meio do infravermelho.

Estando a apenas quatro anos-luz de distância, o sistema Alpha Centauri é um lugar particularmente bom para procurar planetas extrasolares, especialmente após a descoberta de Proxima b – um mundo terrestre potencialmente habitável em órbita ao redor de Proxima Centauri – em agosto do ano passado.

“Este planeta, chamado Proxima b, está em uma órbita que lhe permite ter água líquida em sua superfície, levantando assim a questão de sua habitabilidade”, escreveu a equipe do Laboratório de Astrofísica de Marselha (CNRS) na época.

“É realmente emocionante ter a possibilidade de que haja vida nos portões do nosso sistema solar.”



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This is a newly-discovered drawing by Leonardo da Vinci. The...



This is a newly-discovered drawing by Leonardo da Vinci. The story is surprisingly simple: a man walked into a French auction house, with 14 unframed drawings that had been collected by his bibliophile father. Flipping through them, one in particular surprises the auctioneer. It is a vigorous pen-and-ink study of St. Sebastian tied to a tree, inscribed on the mount “Michelange” (Michelangelo). And on the back, there are two smaller scientific drawings. These diagrammatic studies of candlelight were accompanied by notes written in a minute, Italian Renaissance right-to-left hand. The auctioneer is stunned. Second and third opinions confirm his guess: this is a Leonardo da Vinci. As a preliminary value, the French auction house guesses the work could fetch around 15 million euros, or about USD $15.8 million.

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Well-Preserved Impact Ejecta on Mars


This image of a well-preserved unnamed elliptical crater in Terra Sabaea, is illustrative of the complexity of ejecta deposits forming as a by-product of the impact process that shapes much of the surface of Mars.

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Cognitive Psychology Information and Resources

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Crescent Jupiter with the Great Red Spot


This image of a crescent Jupiter and the iconic Great Red Spot was created by a citizen scientist (Roman Tkachenko) using data from Juno's JunoCam instrument.

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What To Do With Your Rock Collection

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Aldous Huxley, who is most known for his novel Brave New World, had a second career as a...

Aldous Huxley, who is most known for his novel Brave New World, had a second career as a screenwriter. He did film adaptation scripts such as Jane Eyre, Madam Curie, and Pride and Prejudice. Huxley was – for a time – one of the highest paid screenwriters in Hollywood, earning at least $3,000 a week!

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January 12th 1554: King Bayinnaung crownedOn this day in 1554,...





January 12th 1554: King Bayinnaung crowned

On this day in 1554, Bayinnaung was crowned King of Burma in his capital of Pegu, now known as Bago. He came to the Burmese throne at a turbulent time, and had to battle other contenders to the throne after the assassination of his brother-in-law King Tabinshwehti in 1551. After Bayinnaung took power, he continued the work of his predecessor to unify Burma. The King first conquered the Shan-dominated regions of the country, then attacked his most powerful enemy, Siam, modern-day Thailand. After Bayinnaung’s brutal and prolonged campaign against the Siamese, Burma took control of the country. However, the Burmese were eventually expelled from Siam after fifteen years of domination. Bayinnaung is best remembered for his military campaigns, which enabled him to assemble the largest empire in Southeast Asian history. However, on the domestic front he was also heavily involved in promoting Buddhism in Burma. The King died on October 10th 1581, aged sixty-five, and was succeeded by his eldest son Nanda. It was under Nanda’s rule that his father’s vast Toungoo Empire fell apart.

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TODAY IN THE HISTORY OF PSYCHOLOGYVisit –>...



TODAY IN THE HISTORY OF PSYCHOLOGY

Visit –> all-about-psychology.com for free psychology information and resources.

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