Global Warming / Climate Change. Document View - ProQuest. Quarks break free at two trillion degrees. Physicists in the US, India and China have calculated that quarks and gluons can break free from their confinement inside protons and neutrons at a temperature of around two trillion degrees Kelvin – the temperature of the universe a fraction of a second after the Big Bang. The researchers arrived at this figure by combining the results of supercomputer calculations and heavy-ion collision experiments. They say that it puts our knowledge of quark matter on a firmer footing. According to the Big Bang model, the very early universe was filled with "quark–gluon plasma", in which quarks and gluons (the carriers of the strong nuclear force) existed as individual entities.
The strong force between quarks increases rapidly with distance, which means that the quarks need large amounts of energy to remain free – and therefore the plasma can only exist at extremely high temperatures. Anchoring lattice QCD Calculating susceptibilities Finding a critical point. NRL Instrument Provides Key Space Weather Data. Data products from the Special Sensor Ultraviolet Limb Imager (SSULI) developed by the NRL Spacecraft Engineering Department and Space Science Division were officially transitioned for use in operational systems at the Air Force Weather Agency (AFWA) on June 9, 2011.
After extensive validation of the SSULI sensor software and derived atmospheric specification, the Air Force Weather Agency received a formal letter from the Defense Weather Systems Directorate (DWSD) at the Air Force Space and Missile Systems Center (SMC) recommending that they begin using the SSULI data as inputs into Space Weather models and also as standalone data products. "These datasets now in use at the Air Force Weather Agency provide key understanding of the atmosphere for both Department of Defense and civilian users," said Sean Lynch, program manager, NRL Spacecraft Engineering Department. The Air Force is the Department of Defense's executive agent for this program.
Chapman Conference on Remote Sensing of the Terrestrial Water Cycle: NASA Mission Suggests Sun and Planets Constructed Differently. Researchers analyzing samples returned by NASA's 2004 Genesis mission have discovered that our sun and its inner planets may have formed differently than previously thought. Data revealed differences between the sun and planets in oxygen and nitrogen, which are two of the most abundant elements in our solar system. Although the difference is slight, the implications could help determine how our solar system evolved. "We found that Earth, the moon, as well as Martian and other meteorites which are samples of asteroids, have a lower concentration of the O-16 than does the sun," said Kevin McKeegan, a Genesis co-investigator from UCLA, and the lead author of one of two Science papers published this week.
"The implication is that we did not form out of the same solar nebula materials that created the sun - just how and why remains to be discovered. " The air on Earth contains three different kinds of oxygen atoms which are differentiated by the number of neutrons they contain. Astronomy. Doney_schimel_arer_revised_final.pdf (application/pdf Object)
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