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Monday, March 28, 2011

The antihelium was discover

STAR detector

The antihelium
Physics of the Relativistic Heavy Ion Collider (RHIC) in New York claim that they created nuclei of antihelium-4 for the first time – the heaviest antimatter element ever seen on Earth.

Antimatter nuclei are made from antiprotons and antineutrons but, with all the types of combinations of two and three quarks that can appear in the particle collisions, it is rare that multiple antiprotons and antineutrons appear close enough to each other to form anti-nuclei. Although the first antiprotons and antineutrons were discovered in 1950s, the construction of heavier nuclei has been very difficult and each additional anti-nucleon makes the anti-nuclei 1000 less probable to appear in a collision of particles. Until now, the heaviest anti-nuclei observed was limited to three anti-nucleons. But with RHIC experiment and the new detectors of STAR was possible to detect such anti-nuclei.

read more in: physicsworld.com

Versão Portuguesa: em astroPT ou eufisica.com

Monday, March 07, 2011

The lost carbon...

An international team of scientists begins a ten year survey of the 'most important element'



Deep beneath the surface of the Earth, a vast and unseen community of strange, microscopic lifeforms quietly subsists on the heat rising from our planet's interior.


Life has already been found in the deepest layer of Earth's crust, nearly one mile down, but scientists expect to find life thriving even deeper. Studying mysteries like this one is a task for the Deep Carbon Observatory, a new project that will search out not just life but everything carbon-related that lies beneath our feet.
Now in the first year of its planned decade-long existence, the Deep Carbon Observatory aims to reshape our fundamental understanding of carbon's role in the biology, chemistry, and physics of Earth's interior. Unlike typical astronomical observatories, which consist of a single instrument at a fixed location, the Deep Carbon Observatory will be a distributed operation, requiring a wide variety of instruments installed at locations around the world.
Scientists believe that the subterranean microbes, some of them isolated from Earth's surface since before the dawn of humanity, crucially influence the engines that drive our planet's interior. The microbes process carbon relatively quickly, making them an important step in the carbon cycle. But the team behind the Deep Carbon Observatory says the project could also answer questions about many other issues.

Eric Betz, ISNS Contributor
Inside Science News Service
Read the full article in Physics Buzz

Wednesday, March 02, 2011

Final Discovery Mission


Last Journey of Discovery 

Credits: NASA
Yesterday at the launch pad 39A at the Space Kennedy Center, the Shuttle Discovery initiated the final journey.
The STS133 mission of this shuttle to the International Space Station, it has a remarkable new: The ROBONAUT. It's the end for Discovery but the begging to Roboanut.
ROBONAUT 2 - Credits: NASA
See the launch in http://www.eufisica.com/TV/TV.html

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