The choice of which type of electricity is called "positive" and which "negative" was made around 1750 by Ben Franklin, early American scientist and man of many talents. Franklin studied static electricity, produced by rubbing glass, amber, sulfur etc. with fur or dry cloth. ... Later, when electric batteries were discovered, scientists naturally assigned the direction of the flow of current to be from (+) to (-). ... Exploration" home page (index) Glossary . Official GSFC Home Page .. ...

astronomy . Astro Courses . ... IYA 2009 . ... Armagh Planetarium is proud to be associated with the International Year of Astronomy 2009 (IYA2009) . IYA 2009 is a global year of events celebrating all things associated with the absorbing science that is astronomy. ... IYA 2009 Autumn/Winter events . ... Here at Armagh Planetarium one of our most important objectives is to promote formal and informal science education and there will be activities celebrating IYA 2009 throughout the year. ...

With the aim of providing steady development of astronomy and spreading astronomical knowledge the Euro-Asian Astronomical Society (EAAS) and the Euro-Asian Association of Astronomy Teachers (EAATA) of the EAAS with the assistance of the P.K.Sternberg State Astronomical Institute (in Moscow), Special Astrophysical Observatory of Russian Academy of Sciences (in Niznij Arkhyz) and the Moscow-Regional ... The Coordinating Council forms an IAO jury for the period of holding the current Olympiad. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... 2010 February 24 . Astronaut Installs Panoramic Space Window . Credit: ISS Expedition 22 Crew , Shuttle Endeavour STS-130 Crew , NASA . Explanation: This space job was almost complete. Floating just below the International Space Station , astronaut Nicholas Patrick put some finishing touches on the newly installed cupola space windows last week. ... Pictured, Patrick floats near the outermost of seven windows on the new cupola of the just-installed Tranquility module . ... About APOD | ...

... The charge coupled devices (CCD’s) incorporate a full frame transfer (FFT) architecture and is available in front or back illuminated configurations. These are scientific grade CCD’s with low dark current MPP operation, 8 electrons rms readout noise and wide dynamic range. ... By flipping the CCD chip over and chemically etching the back surface we avoid absorption losses encountered in the FI-CCD and greatly enhance sensitivity. ... The readout mode is software controllable. ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . The IDA is a non-profit, membership-based organization. IDA's goal is to be effective in stopping the adverse environmental impact of light pollution and space debris. ... 520) 293-3198 . ... Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Contents and Select Excerpts . ... Winter 2009 . ... Complete content for online Mercury is available to ASP members and institutional subscribers . ... Dark Night, Rowena Davis . ... The International Dark-Sky Association is leading the movement to save our starry skies. ... Imaging the Universe Online, Paul Deans . ... Time-Domain Astronomy, John Avant . ... Astronomy in the News . ... Editorial, Paul Deans . ... Night Sky Brightness . ... Sky Sights, Paul Deans . ... Reflections, Paul Deans . ...

As conditional or control statements you have IF in many variants (but essentially not changed from Fortran 77), DO (with some new variants) and the completely new statement CASE . The DO- loop should now be ended with the statement END DO and we no longer need any statement number. In addition, we can use the statement EXIT to jump out of the DO -loop and CYCLE in order to go to the next iteration of the present DO -loop. ... all negative numbers WRITE (*,*) 'Negative number' CASE (0) ! ...

PhysicsWeb - physics news, jobs and resources - новости физики, важнейшие события (конференции, школы), ресурсы. PhysNet - Worldwide Physics Department and Documents Network - ссылки на сайты физических институтов и факультетов университетов, электронные журналы, научные доклады, препринты, списки публикаций, календарь конференций и научных школ. ... Журналы Американского физического общества . Журналы Института физики . ... Электронные журналы Американского Института физики . ...

... Space flight . Crew training . ... Space camp . ... acquiring practical habits and skills of performing all the flight operations envisaged for a flight participant; . maintaining and honing professionally required qualities and skills for a successful activity in conditions of effect of adverse factors of a space flight, as well . ... preparing for the activity outside the spacecraft; . ... preparing for professional activity in conditions of effect of the space flight factors; . ...