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Des scientifiques du gouvernement américain simulent l'instant d'une bombe nucléaire d'une mégatonne sur un astéroïde

Publié par wikistrike.com sur 14 Mars 2012, 14:42pm

Catégories : #Science - technologie - web - recherche

 

Des scientifiques du gouvernement américain simulent l'instant d'une bombe nucléaire d'une mégatonne sur un astéroïde

Dans un laboratoire du gouvernement U.S., au Nouveau-Mexique, des scientifiques du gouvernement travaillent à la conception d'une bombe capable de détruire un astéroïde géant qui viendrait menacer la terre.
Même si cela peut ressembler à un scénario d'Hollywood, il s'agit d'une réelle simulation informatique.  Une équipe du Laboratoire national de Los Alamos, un établissement du Département de l'Énergie, a utilisé un superordinateur pour modéliser l'efficacité d'une arme nucléaire anti-astéroïde.
Les chercheurs ont dit travailler à partir d'un modèle de roche de l'espace de 1650 pieds de long, avec une bombe d'une mégatonne, environ 50 fois plus puissante que l'explosion de Nagasaki au Japon pendant la seconde guerre mondiale.  Ils ont dit que le test virtuel a réussi.
Conscience du peuple

Straight out of Hollywood: U.S. government scientists simulate the moment a one megaton nuclear bomb destroys a massive asteroid heading for Earth

 

At a US government lab in New Mexico, government scientists race to launch a one megaton nuclear weapon toward a giant asteroid, hoping the massive explosion will save the earth.

While this may sound like the plot of a Hollywood blockbuster, in fact it is the latest hi-tech computer simulation carried out by government scientists.

A team at Los Alamos National Laboratory, a United States Department of Energy facility in New Mexico, used a supercomputer to model a nuclear weapon's anti-asteroid effectiveness.

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Eminent danger: Scientists are looking into ways to destroy large asteroids heading toward Earth

Eminent danger: Scientists are looking into ways to destroy large asteroids heading toward Earth

 

Massive capacity: 32,000 computers ran the program, which tested whether an atomic blast could break apart an asteroid 500m across

Massive capacity: 32,000 computers ran the program, which tested whether an atomic blast could break apart an asteroid 500m across

Researchers were told to deal with a 1,650-foot-long (500-meter) space rock using a one-megaton nuclear weapon — about 50 times more powerful than the U.S. blast inflicted on Nagasaki, Japan during World War II.

 

 

 

Thankfully, they say that even though it was only a virtual test, the approach was successful.

'Ultimately this one-megaton blast will disrupt all of the rocks in the rockpile of this asteroid, and if this were an Earth-crossing asteroid, would fully mitigate the hazard represented by the initial asteroid itself,' Los Alamos scientist Bob Weaver said in a recent video released by the lab.

Effectiveness: The blast in theory entered only parts of the asteroid. In actuality, a nuclear explosion would be used as a last resort

Effectiveness: The blast in theory entered only parts of the asteroid. In actuality, a nuclear explosion would be used as a last resort

 

Last resort: In the 1998 film Armageddon, staring Bruce Willis, explosives had to be placed on the inside of the asteroid to dissipate it

Last resort: In the 1998 film Armageddon, staring Bruce Willis, explosives had to be placed on the inside of the asteroid to dissipate it

‘If one of these objects is spotted at a distance of a few months away, there could be potentially devastation on a worldwide scale.’

The team used the labs supercomputer, which has the power of 32,000 processors found in a normal computer, to recreate as accurately as possible exactly what would happen to the asteroid should the blast hit its surface.

Luckily, the plan worked, meaning a weapon may not have to be deposited inside the asteroid as in the 1998 Bruce Willis film 'Armageddon.'

However the team stress the giant nuclear weapon was only a last resort and researchers are also investigating other methods, including using spacecraft or even the gravitational pull of planets to alter its course.

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Source: Daily Mail 

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