Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Science Fiction . UFOs and Fringe Science . ... Posted on April 1, 2015 | No Comments The тАШDog StarтАЩ or Sirius is a star that has its influential place in astronomical history. ... Continue Reading.. Posted on May 28, 2014 | ... Posted on November 19, 2013 | ... Posted on July 18, 2013 | ... Posted on May 29, 2013 | ... Posted on July 30, 2012 | ... Posted on April 19, 2012 | ... Posted on February 23, 2012 | ...

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The ion rocket is another means of providing thrust, more gradually but also more efficiently than a conventional rocket. ... As in the nuclear rocket, the energy which propels the xenon jet comes from a different source; here it is electrical energy from solar cells. The reason an ion rocket is much more efficient than ordinary rockets is the way its jet is produced. ... As with solar sails, solar ion engines are mainly practical in the inner solar system, where ample sunlight is available. ...

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• Plasma
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... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

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... 03/26/09 - Chelmsford Historic Society holds a star party. Reading Chronicle article on Reading TV astronomy show. ... Front page picture of Barrows School Star Party from Reading Advocate , February 2, 2006. ... Front page photo in Reading Daily Times Chronicle of star party at Killam School. ... Article on front page of Reading Daily Times Chronicle about star party at Killam School, and the pictures published with it. ... Star Parties . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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Stellarium 0.12.3 . ... FileљStructure . ... core . ... 233 љ void azimuthalGridDisplayedChanged( const bool ) const ; . 234 љ void azimuthalGridColorChanged( const Vec3f & newColor) const ; . 235 љ void equatorGridDisplayedChanged( const bool displayed) const ; . 236 љ void equatorGridColorChanged( const Vec3f & newColor) const ; . 237 љ void equatorJ2000GridDisplayedChanged( const bool displayed) const ; . 238 љ void equatorJ2000GridColorChanged( const Vec3f & newColor) const ; . ...

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... Fields: Each document is assigned a unique inventory code. Definitions reflect information commonly found on a document, i.e. title, number, vendor, dates, etc. Please read Fields for detailed definitions. ... details and history of the document.html locator . ... Links: An HTML locator is created when the document is coded. ... Document Files: Each inventory code is a separate document. ... Using the HTML locator links the user to the document. Database Home page | APO Home Page | ...

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... 7a. Fluorescent lamp . ... Plasma is sometimes called "the fourth state of matter", beyond the familiar three--solid, liquid and gas. It is a gas in which atoms have been broken up into free-floating negative electrons and positive ions , atoms which have lost electrons and are left with a positive electric charge. ... The hotter the gas, the faster its atoms and molecules move, and at very high temperatures, the collisions between such fast-moving atoms are violent enough to rip off electrons. ...

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Python Reference Introduction These notes contain commands useful for analysing and plotting data using the Python programming language, together with the Numpy and Matplotlib libraries. ... So for example, the plot command (from matplotlib) would be executed by typing pylab.plot(.. ... Pulling out part of an array. ... To pick out only the chosen elements, and put them in a new array, use something like: new_array = my_array[index_array] Plotting We use Matplotlib (included in pylab) to plot. ...

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OptInt PmWiki : Pm Wiki / Pm Wiki Philosophy . ... Design notes > . This page describes some of the ideas that guide the design and implementation of PmWiki. ... If you need to be writing lots of funky HTML in a web page, then PmWiki is not what you should be using to create it. What PmWiki does try to do is make it easy to link PmWiki to other "non-wiki" web documents, to embed PmWiki pages inside of complex web pages, and to allow other web documents to easily link to PmWiki. ...

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Astronomy Picture of the Day . ... Credit: Walter Lewin ( MIT ) Explanation: What caused this ring of colors? At the time of this writing, MIT Physics Professor Walter Lewin had yet to find someone who can give the correct explanation. ... Not APOD editors . ... Shortly after he gives the explanation on December 7 during a lecture in his course Vibrations and Waves at MIT, APOD will carry a link to it. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...