Arquivo para a ‘Física’ Categoria
Probe lands on Comet
12
Nov
Asked 10 years ago to enter the solar system in orbit, the probe Rosetta has released the module called Philae, which successfully landed on the comet 67/P Churyumov-Gerasimenko, where it will be in the coming months sending data on the celestial body, announced yesterday the European Space Agency (ESA).
The agency has its headquarters in Darmstadt, Germany, announced yesterday the 16h02 (9:02 a.m. EST, Brazil): “We’re in the comet” which caused great excitement in the control center.
The fact is unprecedented in human history, and comets can bring data on the origin of solar systems, about the origin of the universe and even about the origin of life.
After analyzing the telemetry (data travels through the solar system and take almost 30 minutes to reach the earth), it was noticed that the harpoons that hold the probe in the comet did not fire at first, and this attachment can detach the probe before to perform all the desired measures and tests, but maybe the problem is reversed.
Comets travel at very high speeds in the solar system, the P / indicates a comet is periodic with orbital period shorter than 200 years, which makes the calculations a little simpler for landing, but even so it’s like a fly lands on a cannon ball.
Listening to the Big Bang
19
Mar
On this Monday (03/17) Scientists at the Center for Astrophysics (CfA),
the Harvard Smithsonian Institute obtained the “first direct evidence of cosmic inflation”, ie the “noise ” of the explosion that gave birth to the universe 14 billion years ago .
These remarks were made in a telescope at the South Pole and means that the existence of these ripples of space-time , an echo of the Big Bang , which happened in the first split second of the existence of the entire universe whose expansion is called ” cosmic inflation ” , but which until now had not been observed .
The existence of these ripples of space-time , first echo of the Big Bang , which demonstrates experimentally that this was extremely rapid expansion of the universe in the first fraction of a second of its existence , a phase known as cosmic inflation .
According to John Kovac , professor of astronomy and physics at the CfA , ” The detection of these waves is one of the most important goals of cosmology today and the result of an enormous amount of work done by a lot of scientists.”
The bionic man today
29
Oct
He already has human functions : walk, talk , and he has a beating heart (which can do exactly the function of
the human heart ) , but its purpose is not human , is to show the human functions made by technology, and that reason they are first totally bionic man in the world ( bionic man)
So he is ” a mixture of body parts , the bionic man is an amalgam of the most advanced human prostheses ,” as stated in the magazine LiveScience , ” the robotic limbs to artificial organs Circulatory System pumping blood ,” the floor and simulations take as perfect man .
The creature ” came to life ” in ” The Incredible Bionic Man ,” which premiered on Sunday ( October 20 ) at the Smithsonian Channel in a video (see the video of the Bionic Man) .
The devices used in the different organs were developed by different laboratories , such as the eye and the heart, such as prostheses that can be implanted in humans.
Still just merely a machine , without any kind of sense , the fiction of man is six million dollars , or Bicentennial Man , are still in the cinema .
He already has human functions : walk, talk , and he has a beating heart (which can do exactly the function of the human heart ) , but its purpose is not human , is to show the human functions made by technology, and that reason they are first totally bionic man in the world ( bionic man) .
So he is ” a mixture of body parts , the bionic man is an amalgam of the most advanced human prostheses ,” as stated in the magazine LiveScience , ” the robotic limbs to artificial organs Circulatory System pumping blood ,” the floor and simulations take as perfect man .
http://www.livescience.com/40535-show-unveils-worlds-first-bionic-man.html
The creature ” came to life ” in ” The Incredible Bionic Man ,” which premiered on Sunday ( October 20 ) at the Smithsonian Channel in a video (see the video of the Bionic Man) .
The devices used in the different organs were developed by different laboratories , such as the eye and the heart, such as prostheses that can be implanted in humans.
Yet it is only a machine , without any kind of feeling , the fiction of Man of the six million dollars , or Bicentennial Man , are still in the cinema.
Particles, the universe and digital signals
22
Aug
In the early twentieth century, the physics
model that is something we might call today the rigid bodies and low-speed, low compared to the speed of light, which became for quantum physics an important reference because it was she who changed our vision of mass and matter, creating a physical micro-particles that revolutionized even the way of thinking and it is important to understand the ‘information’ outside man.
All we can tell, all the model we have today of the whole universe is connected to this physical and she is about to meet a single model: the micro-particles, including photons particles and electro-magnetic waves in a single model, called Standard Model of Physics, the discovery of the Higgs particles or Particle of God in recent experiment done in the particle accelerator at the borders of France to Swizerland it helps this model.
But we must understand that this model corresponds to only what we understand as matter, that this is most stable part of the universe, and physicists call baryonic matter, even though 22% of this it is a “dark matter” (baryonic and non-baryonic) , and there are still a matter totally unknown, but acting on gravitational attraction, which is called dark energy, which permeates the darkness of space.
This information model profoundly influenced the thought of Claude Shannon, a young student who worked on the influence of Norbert Wiener, father of cybernetics, and Vannevar Bush, both his professors at MIT, and which work very close in the late 30.
Later meet up with Alain Turing and then begin to develop this information model “quantized” who wrote in 1948 “The mathematical theory of communication, prefaces by Warren Weaver, and Wherefore sometimes called theory of Shannon-Weaver.
Shannon’s theory was essential to provide treatment “digital signals” analog for it some times is seen as a theory of digital signals and not information.
Criação de buraco negro é observada
18
Feb
Supernovas é o nome dado a astros solares com massa de mais de 10 vezes um astro solar, muito brilhantes, mas que desaparecem em algumas semanas ou meses após a explosão.
Buracos negros, formados justamente pela explosão desta massa das supernovas, mas raramente foram observados, em geral quando uma estrela é “absorvida” pelo buraco, quanto menos massa possue, maior é a densidade da matéria que forma o buraco negro.
Um buraco negro estelar é criado quando uma explosão de supernova destrói uma estrela maciça. Os cientistas já descobriram dezenas de buracos negros, mas todos eles já estavam formados. Agora, os cientistas viram a formação recente de diferentes restos distorcidos de uma supernova, então eles sabiam que era algo especial, conforme estudo do MIT, recentemente publicado.
O que os cientistas acreditam terem observarado são as fases de infância de um buraco negro, ou o mais jovem buraco negro já registrado na Via Láctea, e que ficou chamado de W49B, visto como um redemoinho vibrante de tons de azul, verde, amarelo e rosa.
Visto da terra, o astro tem cerca de 1.000 anos de idade e está localizado a cerca de 26.000 anos-luz de distância. Um buraco negro típico anteriormente conhecido, como SS433, é pensado para ser entre 17 mil – e 21.000 anos de idade, quando visto da Terra.
“W49B é o primeiro de seu tipo a ser descoberto na galáxia”, disse Laura Lopez, que conduz um estudo sobre o remanescente, no Instituto de Tecnologia de Massachusetts, e afirmou num comunicado. “Parece que sua estrela-mãe terminou a sua vida de uma forma que a maioria dos outros não.”
Outro pesquisador Daniel Castro, também do MIT, afirmou: “É uma rara circunstancia, mas temos evidências intrigantes que a supernova W49B criou um buraco negro”, e concluiu: “Se for esse o caso, temos uma rara oportunidade de estudar uma supernova como responsável pela criação de um buraco negro jovem”, isto é de 1000 anos.
Vemos uma dimensão do tempo e da vida completamente misteriosa e diferente, isto deveria fazer pensar humildemente místicos, céticos e cientistas.
