Latest Second Stories

ESA Welcomes Arrival Of Pharao
2014-07-29 03:14:46

ESA ESA has welcomed the arrival of Pharao, an important part of ESA’s atomic clock experiment that will be attached to the International Space Station in 2016. Delivered by France’s CNES space agency, Pharao is accurate to a second in 300 million years, which will allow scientists to test fundamental theories proposed by Albert Einstein with a precision that is impossible in laboratories on Earth. Time is linked to gravity and, for example, passes faster at the top of Mount...

New U.S. Time Standard Launched By NIST
2014-04-04 13:21:23

[ Watch The Video: NIST-F2 Atomic Clock Sets The Time Standard ] NIST The U.S. Department of Commerce's National Institute of Standards and Technology (NIST) has officially launched a new atomic clock, called NIST-F2, to serve as a new US civilian time and frequency standard, along with the current NIST-F1 standard. NIST-F2 would neither gain nor lose one second in about 300 million years, making it about three times as accurate as NIST-F1, which has served as the standard...

JILA Strontium Atomic Clock Unveiled And Sets New Records In Precision, Stability
2014-01-23 09:53:25

National Institute of Standards and Technology (NIST) Heralding a new age of terrific timekeeping, a research group led by a National Institute of Standards and Technology (NIST) physicist has unveiled an experimental strontium atomic clock that has set new world records for both precision and stability-- key metrics for the performance of a clock. The clock is in a laboratory at JILA, a joint institute of NIST and the University of Colorado Boulder. Described in a new paper in...

2013-12-31 23:03:12

AGI and Other Subject Matter Experts Contribute to American Astronautical Society’s “Requirements for UTC and Civil Timekeeping on Earth” Exton, PA (PRWEB) December 31, 2013 The American Astronautical Society (AAS) recently published “Requirements for UTC and Civil Timekeeping on Earth,” a book detailing expert opinions about the present and future course of civil timekeeping. Based on the proceedings of an international colloquium held in spring 2013, the text expands on...

Connecting Clocks To Measure Height
2013-10-02 11:10:16

Physikalisch-Technische Bundesanstalt (PTB) Researchers from Garching and Braunschweig transport frequencies with high precision over almost 2000 km - important, among other things, for geodesy How far above sea level is a place located? And where exactly is "sea level"? It is one objective of the geodesists to answer these questions with 1 cm accuracy. Conventional measurement procedures or GPS technologies via satellites, however, reach their limits here. Now optical atomic clocks...

New Stability Record Set By NIST Ytterbium Atomic Clocks
2013-08-22 14:45:09

National Institute of Standards and Technology (NIST) A pair of experimental atomic clocks based on ytterbium atoms at the National Institute of Standards and Technology (NIST) has set a new record for stability. The clocks act like 21st-century pendulums or metronomes that could swing back and forth with perfect timing for a period comparable to the age of the universe. NIST physicists report in the Aug. 22 issue of Science Express that the ytterbium clocks' tick is more stable than...

Redefining Time With Innovative Optical Lattice Clock
2013-07-10 12:56:58

Michael Harper for redOrbit.com - Your Universe Online Atomic clocks are the standard in time, hailed as the most accurate and often used to keep other clocks on time. Now, a new kind of clock aims not only to replace atomic clocks as the most accurate, but to redefine the second as a measurement of time as well. The new device, called an optical lattice clock (OLC) is, theoretically, three times more accurate than current atomic clocks. In computer models, these clocks lost only one...

Berkeley Physicist Uses Atomic Matter To Tell Time
2013-01-11 15:06:34

Brett Smith for redOrbit.com - Your Universe Online In a groundbreaking new study, physicists from the University of California, Berkeley have used atomic matter to measure time. According to a new report in the journal Science, Holger Müller and his Berkeley colleagues describe how to tell time using a cesium atom and the theory that matter can be both a particle and a wave. "When you make a grandfather clock, there is a pendulum and a clockwork that counts the...

Better Accuracy For Optical Strontium Clock
2013-01-03 11:30:03

Alpha Galileo Foundation PTB measures the influence of the ambient temperature on strontium atoms for the first time — measurement uncertainty reduced by one order of magnitude An optical clock with neutral strontium atoms is considered one of the top candidates for the definition of a "new" second. The probabilities have increased considerably, since its frequency will now be determined more accurately (probably by an order of magnitude). Scientists of the Physikalisch-Technische...

Atomic Clocks May Survey Earth's Insides
2012-11-12 15:17:48

Lee Rannals for redOrbit.com - Your Universe Online Scientists say they are planning to use portable atomic clocks to help identify mineral deposits and concealed water resources inside the Earth. An international team believes that atomic clocks could already have reached the necessary degree of precision to be useful for geophysical surveying. They said that these clocks will provide the most direct measurement of the geoid, which is the Earth's true physical form. The Earth's...

Latest Second Reference Libraries

2009-07-10 12:54:52

Cesium (or Caesium) is a chemical element with the symbol Cs and atomic number 55. Caesium is a soft alkali metal that is silvery-gold. It melts and liquefies at 83 degrees Fahrenheit and is one of only five metals that are liquid close to room temperature. Caesium is a metal that is most widely known for its use in atomic clocks. Cesium comes from the Latin word caesius meaning "˜bluish-gray'. It was discovered in 1860 by Robert Bunsen and Gustav Kirchhoff in Durkheim, Germany in mineral...

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Word of the Day
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.