Now it is possible to achieve "temperatures" extremely close to absolute zero milli- even micro- degrees (provided that the temperature scale is properly established at those temperatures, which is by no means a trivial problem all by itself).
www.newton.dep.anl.gov/askasci/chem00/chem00947.htm www.newton.dep.anl.gov/askasci/chem00/chem00947.htm
Absolute zero - Wikipedia, the free encyclopedia
Absolute zero is a temperature marked by a 0 entropy configuration. It is the coldest temperature theoretically possible and cannot be reached by artificial or natural means, because it is impossible...
en.wikipedia.org/wiki/Absolute_zero
“
If you want to cool something down, say a cup of hot water, you put it near something that is cooler, a bigger cup of cold water. So in order to cool something to absolute zero we need something that is colder than absolute zero. Now call m...
http://www.answerbag.com/q_view/91733
The lowest possible energy state, all the spins pointing down, gives the system a total energy of -NuB, and temperature of absolute zero. There is only one configuration of the system at this energy, i.e., all the spins must point down.
math.ucr.edu/home/baez/physics/ParticleAndNuclear/neg_t... math.ucr.edu/home/baez/physics/ParticleAndNuclear/neg_temperature.html
Is it possible to achieve Absolute zero kelvin?At this temperature what will be the state of matter?Give some examples for real and ideal gases. 1) Theoretically yes, practically no. I'll - india life. ... I'll put it this way- if we could create absolute zero, then we wouldn't be able to measure it, because to measure...
www.12397.com/indias/Absolute-zero_25232.html www.12397.com/indias/Absolute-zero_25232.html
Q.: How are temperatures close to absolute zero achieved and measured? ... First, let me introduce what the scientific meaning of  temperature is.:  It is a measure of the energy content of matter.  When air is hot, the molecules move fast, they have high kinetic energy.  The colder the molecules are, the smaller is...
cua.mit.edu/ketterle_group/Popular_papers/Ultralow_temp... cua.mit.edu/ketterle_group/Popular_papers/Ultralow_temperatures.htm
Kelvin decided to maintain the Centigrade scale but make the starting point the coldest temperature possible to achieve. Thus absolute zero is 373.15°C lower than water's boiling point2.
www.bbc.co.uk/dna/h2g2/alabaster/A291034
How Low; Can You Go?; In our virtual lab, use the "cascade" process to achieve dramatically lower temperatures. ... Absolute Zero: The story of the harnessing of cold and the race to reach the lowest temperature possible.
www.pbs.org/wgbh/nova/zero/ www.pbs.org/wgbh/nova/zero/
It does generally mean that all particles have to be in their lowest possible energy state. Since the lowest energy state of an electron in an atom is stable, the electron will not fall into the nucleus, which was one of your "concerns." Still, it is generally considered impossible to physically achieve absolute zero.
www.madsci.org/posts/archives/may97/859993344.Ph.r.html