Absolute zero - Wikipedia, the free encyclopedia
Absolute zero is the coldest temperature theoretically possible. It cannot be reached by artificial or natural means, because it is impossible to decouple a system fully from the rest of the universe...
en.wikipedia.org/wiki/Absolute_zero
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Although absolute zero cannot be reached, temperatures within a few billionths of a degree above absolute zero have been achieved in the laboratory.
http://qanda.encyclopedia.com/question/can-absolute-zer...
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Although absolute zero cannot be reached, temperatures within a few billionths of a degree above absolute zero have been achieved in the laboratory. At such low temperatures, gases assume nontraditional states, the Bose-Einstein and fermion...
http://qanda.encyclopedia.com/question/has-absolute-zer...
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Getting to absolute zero is less a matter of cooling something to 0 degrees Kelvin (-273 C or -459.6 F) than it is to designing a way to measure the temperature once you get there. The atoms of all materials at a temperature above 0 K are in incessant motion.
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www.newton.dep.anl.gov/askasci/chem00/chem00947.htm
www.newton.dep.anl.gov/askasci/chem00/chem00947.htm
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In all materials, a point is eventually reached at which all oscillations are the slowest they can possibly be. The temperature which corresponds to this point is called absolute zero. Note that the oscillations never come to a complete stop, even at absolute zero.
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www.pa.msu.edu/~sciencet/ask_st/012992.html
www.pa.msu.edu/~sciencet/ask_st/012992.html
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Why can't Absolute Zero be reached? The equipment we use to try and get to 0 kelvin emits heat... So, at the moment, we can reach it. Science > Physical sciences > Physics... ... Although absolute zero cannot be reached, temperatures within a few billionths of a degree above absolute zero have been achieved in the laboratory.
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www.answerbag.com/q_view/692637
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Is Absolute Zero reached on the Moon? ... Nights are cold, very cold, but 14 days are not enough to reach absolute zero. Some heat still comes in from earthlight, and I suspect the Moon contains enough radioactive elements to generate a little heat of its own, the way the solid Earth does.
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www.iki.rssi.ru/mirrors/stern/stargaze/StarFAQ8.htm
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The University of Sussex at Brighton. ... Absolute zero is reached firstly by pre-cooling atoms through bouncing lasers off them. The atoms, which are held in a high quality vacuum, like a sophisticated thermos, are then trapped with a strong magnet so that only the hottest atoms can escape.
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www.sussex.ac.uk/press_office/bulletin/16oct98/article1...
www.sussex.ac.uk/press_office/bulletin/16oct98/article1.html
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To see quantum effects in large objects, they must be cooled to near absolute zero. Such low temperatures can only be reached by keeping objects as motionless as possible. At absolute zero (0 degrees Kelvin, -273 degrees Celsius or -460 degrees Fahrenheit), atoms lose all thermal energy and have only their quantum motion.
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web.mit.edu/newsoffice/2007/super-cool.html
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