Sentences with phrase «sustaining nuclear reaction»

Aaronson compares it to the first self - sustaining nuclear reaction, achieved by the Manhattan project in Chicago in 1942.

From the way the object bent the light, Andrew Gould of Ohio State University in Columbus and colleagues have now found that it is a brown dwarf — a «failed star» with too little mass to sustain the nuclear reactions that power stars.

A succession of mishaps and a scandal over an attempt to cover up an accident have kept the facility shut down for all but a few months since it first achieved criticality, or a sustained nuclear reaction, in 1994.

The glowing gaseous shrouds in the nebula were shed by the central star after it ran out of fuel to sustain the nuclear reactions in its core.

Not exact matches

Forty - five years after Humanae Vitae, it now seems clear that the invention of the oral contraceptive pill (to adopt one reference point for the broader contraceptive revolution) was one of the three achievements of 20th - century science with truly world - historical impact, the other two being the creation of the self - sustaining nuclear chain reaction and the unraveling of the DNA double helix.

Some MACHOs may be neutron stars left behind after supernovae explosions, but most are thought to be tiny failed stars called brown dwarfs which have a mass of less than 8 per cent that of the Sun and are too small to sustain nuclear fusion reactions.

For decades scientists have sought to generate clean energy by instigating the kind of sustained nuclear fusion reactions that power the sun.

For one thing, there's a chance that enough plutonium could congregate to trigger a nuclear chain reaction, or criticality — the self - sustaining cascade of atomic fission that releases massive amounts of energy.

In December 1942 Enrico Fermi achieved the first self - sustaining nuclear chain reaction, harnessing the process that would be used to lay waste to the Japanese cities of Nagasaki and Hiroshima in August 1945.

Although they are as common as stars and form in much the same way, brown dwarfs lack the mass necessary to sustain nuclear fusion reactions.

The reactor in an ADS contains too little fissile material in its core to sustain a nuclear chain reaction.

If the injury leading to death occurred while the deceased was in the process of working on or repairing a car; doing certain commercial work or work for charge as defined in the specifics of the mandatory car insurance policy; died as a result of suicide, died as a result of war, nuclear reaction, or contamination; died as a result of being struck by a railroad car or a farm tractor; or died as a result of injuries sustained while racing, there is generally no coverage on these types of policies.