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New mass map of distant galaxy cluster is most precise yet

Thu, 24 Jul 2014 10:42:20 EDT

Astronomers have mapped the mass within a galaxy cluster more precisely than ever before. Created using observations from Hubble's Frontier Fields observing program, the map shows the amount and distribution of mass within MCS J0416.1-2403, a massive galaxy cluster found to be 160 trillion times the mass of the Sun.


250-Year-Old Eyewitness Accounts of Icier Arctic Attest to Loss of Sea Ice

Fri, 25 Jul 2014 13:00:00 GMT

Centuries-old ships’ logs reveal clues to Arctic warming

-- Read more on ScientificAmerican.com


Astrônomo Ronaldo Mourão morre aos 79 anos no Rio

26 Jul 2014 18:45:00 -0300

Autor de mais de 40 livros e com centenas de artigos publicados em periódicos internacionais, Ronaldo Rogério de Freitas Mourão se graduou em física pela Universidade da Guanabara (atual UERJ) e, em 1967, recebeu o título de doutor pela Universidade de Paris, na França. Seus estudos se concentraram nas estrelas duplas e em corpos distantes do Sistema Solar. Foi pesquisador do Observatório Nacional e descobriu uma série de asteroides.
Apesar da grande experiência no meio acadêmico, o maior sucesso de Mourão foi na divulgação científica.

Divulgação UFJF
O astrônomo e divulgador científico Ronaldo Mourão
O astrônomo e divulgador científico Ronaldo Mourão
Leia mais (07/26/2014 - 18h45)


New approach in search for extraterrestrial intelligence: Target alien polluters

Wed, 23 Jul 2014 11:12:20 EDT

Humanity is on the threshold of being able to detect signs of alien life on other worlds. By studying exoplanet atmospheres, we can look for gases like oxygen and methane that only coexist if replenished by life. But those gases come from simple life forms like microbes. What about advanced civilizations? Would they leave any detectable signs? They might, if they spew industrial pollution into the atmosphere.


Atmosphere of Titan, Saturn's largest moon

Wed, 23 Jul 2014 11:10:30 EDT

An astronomer has published the results of the comparison of his model of Titan's atmosphere with the latest data.


Lives and deaths of sibling stars

Wed, 23 Jul 2014 11:09:24 EDT

In a new image from ESO, young stars huddle together against clouds of glowing gas and lanes of dust. The star cluster, NGC 3293, would have been just a cloud of gas and dust itself about ten million years ago, but as stars began to form it became the bright group of stars we see here. Clusters like this are laboratories that allow astronomers to learn about how stars evolve.


Satellite galaxies put astronomers in a spin

Wed, 23 Jul 2014 11:08:35 EDT

Astronomers have studied 380 galaxies and shown that their small satellite galaxies almost always move in rotating discs. However, such satellite galaxy discs are not predicted by current models of the formation of structures in the Universe. This discovery could cause modelers serious headaches in the years ahead.


NASA's Chandra X-ray Observatory celebrates 15th anniversary

Tue, 22 Jul 2014 12:48:50 EDT

Fifteen years ago, NASA's Chandra X-ray Observatory was launched into space aboard the Space Shuttle Columbia. Since its deployment on July 23, 1999, Chandra has helped revolutionize our understanding of the universe through its unrivaled X-ray vision.


NASA's Fermi finds a 'transformer' pulsar

Tue, 22 Jul 2014 12:04:52 EDT

In late June 2013, an exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA's Fermi Gamma-ray Space Telescope.


Hubble traces halo of a galaxy more accurately than ever before: An in-depth look at giant elliptical galaxy Centaurus A

Tue, 22 Jul 2014 10:22:43 EDT

Astronomers have probed the extreme outskirts of the stunning elliptical galaxy Centaurus A. The galaxy's halo of stars has been found to extend much further from the galaxy's center than expected and the stars within this halo seem to be surprisingly rich in heavy elements. This is the most remote portion of an elliptical galaxy ever to have been explored.


Índios ajudam a frear aquecimento global, aponta relatório

24 Jul 2014 01:43:00 -0300

Florestas em terras indígenas abrigam 37,7 bilhões de toneladas de carbono em todo o mundo. Se fossem destruídas, o CO2 lançado ao ar superaria as emissões globais de veículos durante 29 anos. Por sorte, os índios têm sido mais eficazes do que qualquer outro grupo humano no combate ao desmatamento. A estimativa está em um relatório divulgado nesta quarta-feira (23) pelas ONGs WRI (World Resources Institute) e RRI (Rights and Resources Initiative). Pesquisadores das duas entidades cruzaram os números de preservação florestal em terras indígenas e de povos tradicionais com dados da FAO (Organização das Nações Unidas para Alimentação e Agricultura) sobre biomassa de florestas. O levantamento foi feito em 2013. Segundo o relatório, cerca de um oitavo da área de florestas tropicais hoje está dentro dessas áreas. Comparadas com florestas que estão fora da jurisdição de índios, as terras fora delas têm exibido uma taxa de proteção fraca. Leia mais (07/24/2014 - 01h43)


Oceans vital for possibility for alien life

Sun, 20 Jul 2014 20:34:59 EDT

Researchers have made an important step in the race to discover whether other planets could develop and sustain life. New research shows the vital role of oceans in moderating climate on Earth-like planets Until now, computer simulations of habitable climates on Earth-like planets have focused on their atmospheres. But the presence of oceans is vital for optimal climate stability and habitability.


Darwin e Deus: Deus com asas de... abutre?

23 Jul 2014 17:19:00 -0300

Momento solene: no livro do Êxodo, o segundo da Bíblia (capítulo 19, versículo 4, para ser mais exato), Deus está formalizando sua aliança com o povo de Israel, logo depois de intervir miraculosamente para libertar os escravos hebreus do Egito. ... Leia post completo no blog Leia mais (07/23/2014 - 17h19)


Should the Apollo Lunar Landing Sites Be Protected?

Sat, 19 Jul 2014 13:00:00 GMT

On the anniversary of the first moon landing many wonder what will become of the Apollo sites and their artifacts  

-- Read more on ScientificAmerican.com


Mensageiro Sideral: Vivemos no país do Plunct-Plact-Zum

23 Jul 2014 06:07:00 -0300

Em 28 de dezembro de 2010, o então ministro da Ciência, Tecnologia e Inovação, Sergio Rezende, assinou, em nome do governo brasileiro, o acordo para que o país fizesse parte do ESO (Observatório Europeu do Sul), a maior organização de ... Leia post completo no blog Leia mais (07/23/2014 - 06h07)