terça-feira, 30 de setembro de 2014

Pluto's a planet, according to a new public debate


Scientists got together last week in the US to battle it out over what actually makes a planet, and where poor old Pluto fits into everything. Thanks to a popular vote, the argument for Pluto being a planet came out on top. Read more.

segunda-feira, 29 de setembro de 2014

Where Did Earth's Water Come From?


sexta-feira, 26 de setembro de 2014

13 Misconceptions About Global Warming


Touché!


How to Never Miss an Aurora



I'm often asked when is the best time to see the northern lights. I usually point out that they're connected to solar flares and vast eruptions of solar plasma called coronal mass ejections or CMEs. While these violent events and the auroras they spawn are more common during the peak of the sunspot cycle, they're liable to happen anytime and can be as unpredictable as earthly weather.
Not a very satisfying answer, I'll admit. But before you throw up your arms and seek another seer, allow me to arm you with several essential tools. If consulted regularly, I guarantee your chances of seeing an aurora will be maximized. Read more.

I'm often asked when is the best time to see the northern lights. I usually point out that they're connected to solar flares and vast eruptions of solar plasma called coronal mass ejections or CMEs. While these violent events and the auroras they spawn are more common during the peak of the sunspot cycle, they're liable to happen anytime and can be as unpredictable as earthly weather.
Not a very satisfying answer, I'll admit. But before you throw up your arms and seek another seer, allow me to arm you with several essential tools. If consulted regularly, I guarantee your chances of seeing an aurora will be maximized. Don't flog me if clouds show up. They're not part of the deal.
- See more at: http://www.skyandtelescope.com/astronomy-news/observing-news/sleuth-aurora-09252014/#sthash.Y1RpAeJ9.dpuf
I'm often asked when is the best time to see the northern lights. I usually point out that they're connected to solar flares and vast eruptions of solar plasma called coronal mass ejections or CMEs. While these violent events and the auroras they spawn are more common during the peak of the sunspot cycle, they're liable to happen anytime and can be as unpredictable as earthly weather.
Not a very satisfying answer, I'll admit. But before you throw up your arms and seek another seer, allow me to arm you with several essential tools. If consulted regularly, I guarantee your chances of seeing an aurora will be maximized. Don't flog me if clouds show up. They're not part of the deal.
- See more at: http://www.skyandtelescope.com/astronomy-news/observing-news/sleuth-aurora-09252014/#sthash.Y1RpAeJ9.dpuf

Are chemicals really bad for you?


segunda-feira, 22 de setembro de 2014

Antimatter Explained


sábado, 20 de setembro de 2014

Teilchenphysik: Auf der Spur des mysteriösen Neutralinos


Tau-Neutrino, Strange Quark, Gluon - exotische Elementarteilchen kennen Physiker jede Menge. Zuletzt sorgte das am Cern-Beschleuniger in Genf aufgespürte Higgs-Boson für Schlagzeilen. Nun berichten Forscher über Hinweise auf ein bislang nur in der Theorie bekanntes Teilchen mit dem Namen Neutralino, das laut dem Partikelmodell der Physiker zur rätselhaften Dunklen Materie gehört. Mehr lesen.

The Comet That Outgrew The Sun

http://www.iflscience.com/space/comet-outgrew-sun

Supercool metals make light iPhone cases that are 50 times harder than plastic


Researchers at Yale University in the US have created a thin, lightweight smartphone case that’s harder than steel but as easy to shape as plastic. The case is made from bulk metallic glass (BMG) - a class of strong but flexible materials that have been around for years but, until recently, engineers have struggled to find a way to shape them into useful structures. Read more.

quinta-feira, 18 de setembro de 2014

O ALMA observa origem violenta de galáxias de disco

Durante décadas os cientistas acreditaram que da fusão de galáxias resultavam geralmente galáxias elípticas. Agora, e pela primeira vez, os investigadores, com o auxílio do ALMA e um conjunto de outros rádio telescópios, descobriram evidências diretas de que as galáxias em fusão podem também dar origem a galáxias de disco e que este fenómeno é até bastante comum. Este resultado surpreendente pode explicar porque é que existem tantas galáxias em espiral como a Via Láctea no Universo. 
Uma equipa de investigação internacional liderada por Junko Ueda, pós-doutorando da Sociedade Japonesa  para a Divulgação da Ciência,  fez observações surpreendentes que mostram que a maioria das colisões galácticas no Universo próximo - entre 40 e 600 milhões de anos-luz de distância da Terra - dão origem às chamadas galáxias de disco. As galáxias de disco - que incluem as galáxias em espiral como a Via Láctea e as galáxias lenticulares - definem-se como possuindo regiões de gás e poeira em forma de panqueca e são bastante diferentes da categoria das galáxias elípticas. Ler mais.

Astronomy Detectives Reveal Origin of Monet's 'Impression' Painting

Astronomical clues could pinpoint the day Claude Monet painted "Impression, Soleil Levant (Impression, Sunrise)," the art piece that lent its name to the Impressionist art movement.
Based on the celestial detective work of Donald Olson, a Texas State University astronomer and physics professor, curators think they've identified the moment that Monet attempted to capture from his hotel room in the city of Le Havre, France: Nov. 13, 1872, 7:35 a.m. Read more.

terça-feira, 16 de setembro de 2014

Magnetism and quantum mechanics



Think you understand magnets? Scientists have realised over the past century that, despite what we thought we knew, magnetism is nothing but quantum mechanics.  Read more.

segunda-feira, 15 de setembro de 2014

The Secret Social Life of Plants


TED talk: All it takes is 10 mindful minutes



When is the last time you did absolutely nothing for 10 whole minutes? Not texting, talking or even thinking? Mindfulness expert Andy Puddicombe describes the transformative power of doing just that: Refreshing your mind for 10 minutes a day, simply by being mindful and experiencing the present moment. (No need for incense or sitting in uncomfortable positions.) 

First Map of Rosetta's Comet

http://orbiterchspacenews.blogspot.co.at/2014/09/first-map-of-rosettas-comet.html?spref=fb

sexta-feira, 12 de setembro de 2014

Physicists capture the sound of an atom



For the first time, scientists have used sound to communicate with an artificial atom, demonstrating a curious phenomenon in quantum physics that sees sound waves take on the role of light. Read more.

Why Do We Have More Boys Than Girls?


Immer online


Dupla explosão solar rara a caminho da Terra




Uma rara explosão dupla de tempestades solares magneticamente carregadas atingirá a Terra, durante quinta-feira, nos EUA, madrugada em Portugal, e de sexta-feira. As autoridades temem que as comunicações por rádio, transmissões de energia e sinais de GPS possam ser afetados. Ler mais.

segunda-feira, 8 de setembro de 2014

Perspective

"The universe seems neither benign nor hostile, merely indifferent." - Carl Sagan

Time Travel Simulation Resolves “Grandfather Paradox”


What would happen to you if you went back in time and killed your grandfather? A model using photons reveals that quantum mechanics can solve the quandary—and even foil quantum cryptography. Read more. 

Happy Monday Coffee Lovers!


Is Coffee Bad For You? Coffee has both positive and negative effects on the body and mind, but the benefits appear to outweigh the dangers for most people. Read more.

In the mood for love



Why do we fall in love? And what is love, anyway? 10 TED talks to help us understand the mystery of love.

European Planetary Science Congress 2014


07 – 12 September 2014
Centro de Congressos do Estoril, Cascais, Portugal

As with the highly successful meeting in London in 2013, which attracted 960 attendees (the largest yet for an all European EPSC), it will provide an attractive platform to exchange and present results, develop new ideas and to network the planetary science community in Europe. It will continue to have a distinctively interactive style, with a mix of talks, workshops and posters, intended to provide a stimulating environment for the community to meet. The meeting will cover the whole scope of planetary science. Read more.

This Week in Science


quinta-feira, 4 de setembro de 2014

Airglow Ripples over Tibet

Image Credit & Copyright: Jeff Dai

The Death Valley sliding stones

http://sci2.tv/?utm_source=facebook.com&utm_medium=social&utm_campaign=ScienceChannel/#!/videos/1312


Researchers have solved the mystery of the Death Valley sliding stones.