Sunday, November 28, 2010
Saturday, November 27, 2010
Universo era líquido logo depois do Big Bang: "As primeiras colisões de núcleos de chumbo realizadas no LHC mostraram que o Universo primordial, logo depois do Big Bang, era quente, denso e tinha a viscosidade de um líquido."
|Esta é uma imagem de uma colisão real de núcleos de chumbo, captada pelo experimento ALICE. Os riscos representam o caminho das partículas, os "cacos" que voam para todos os lados depois da colisão.[Imagem: Cern]|
Wednesday, November 24, 2010
Thursday, November 18, 2010
image and text from berkeley.edu"Physicists working at the European Organization for Nuclear Research (CERN) in Geneva, Switzerland, have succeeded in trapping antihydrogen — the antimatter equivalent of the hydrogen atom — a milestone that could soon lead to experiments on a form of matter that disappeared mysteriously shortly after the birth of the universe 14 billion years ago.
An octupole magnet was critical to trapping antihydrogen atoms. A simple octupole magnetic field is produced by eight bar magnets in a plane with their north and south poles arrayed radially to create a magnetic minimum at the center. The antihydrogen atom is trapped in the center because of its magnetic moment, which itself is equivalent to a tiny bar magnet. The bar magnets above and below the octupole plane in this artist's rendition represent the mirror magnets that keep the atoms from squirting out the ends of the trap. (Katie Bertsche)The first artificially produced low energy antihydrogen atoms — consisting of a positron, or antimatter electron, orbiting an antiproton nucleus — were created at CERN in 2002, but until now the atoms have struck normal matter and annihilated in a flash of gamma-rays within microseconds of creation."
read the FULL ARTICLE
Tuesday, November 16, 2010
NASA said yesterday at a press conference that the Chandra space observatory appears to have found the youngest black hole yet found. The black hole should be a baby at the tender age of 30 years.
The Black Hole was formed after the supernova, SN 1979C. The star had a mass 20 times greater than our Sun. The supernova was detected in 1979 in the galaxy M100, which is located 50 million light years away from Earth. The Supernova actually took place some 50 million years ago, but as the light took that long to reach us, we only saw 30 years ago. So, looking for the same site now, we see what looks like a black hole young, 30 years - since we saw the supernova until today (actually, the black hole is 50 million years, but the "light "that surrounds it takes time to get to us). Look for objects in space, you see them as they were when the light left them, and not as they are "now" (When looking at the sun, for example, always see the sun as it was eight minutes before).
More in NASA, Discovery, Universe Today, Dvice, e o artigo científico.
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Actress performance... but she is a ROBOT!
A life-like robot called Geminoid F has taken to the stage in Japan, but is there a chance it will it take over from the "real" performers?
Geminoid F was seated for the duration of the short play and her actions were controlled from behind-the-scenes by a human.from BBC news
Saturday, November 13, 2010
Thursday, November 11, 2010
Tuesday, November 09, 2010
First collisions of lead ions seen by the ALICE experiment on 07.11.2010 recorded by its innermost detector, the Inner Tracking System.
The shaded structures represent a perspective view of the detector elements. The lines are the reconstructed particle trajectories and the colour scale indicates the energy of the particles.
Such collisions produce an unprecedented number of particles, reaching thousands per collision.
Credits: ALICE experiment, CERN
Sunday, November 07, 2010
Friday, November 05, 2010
Discovery launch was delayed until the end of November.
|Credit: NASA's Kennedy Space Center|
An 8-inch crack has been spotted in the foam covering the intertank section of the shuttle Discovery's external tank. Engineers are assessing that situation, which has developed since the tank was drained of its supercold propellants today.
Mission Management Team prelaunch chairman Mike Moses says officials determined it just wasn't prudent to push toward a Monday launch attempt given the amount of work ahead to resolve the hydrogen leak.
Moses says the foam crack is located on the front side of the tank facing the orbiter and just above the bipod where Discovery's nose is attached. He said it's too soon to know what might need to be done with that crack.
image credits: NASA
Thursday, November 04, 2010
NASA - EPOXI
Comet Hartley 2 photo:
Comet Hartley 2 photo:
11.04.10 -- NASA's EPOXI mission successfully flew by comet Hartley 2 at about 7 a.m. PDT (10 a.m. EDT) today, and the spacecraft has begun returning images. Hartley 2 is the fifth comet nucleus visited by a spacecraft.
This close-up view of comet Hartley 2 was taken by NASA's EPOXI mission during its flyby of the comet on Nov. 4, 2010. It was captured by the spacecraft's Medium-Resolution Instrument. Image credit: NASA/JPL-Caltech/UMD