All stars derive their energy through the thermonuclear fusion of light elements in to heavy elements. High temperatures are required so that the mutual electrostatic repulsion of the protons in each fusing atomic nucleus is overcome. ... Elements with more protons in their nuclei require higher temperatures. ... This sequence is now shown in the animation below. ... First Step of the Proton-Proton Chain Narration . Second Step of the Proton-Proton Chain Narration . ...

Stellarium 0.12.3 . ... Classes . ... Supernova Class Reference . ... Supernova (const QVariantMap &map) . ... Get a QVariantMap which describes the supernova. ... getSelectPriority (const StelCore *core) const . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getVMagnitude (const StelCore *core, bool withExtinction=false) const . ... getAngularSize (const StelCore *core) const . ... getPositionInfoString (const StelCore *core, const InfoStringGroup &flags) const . ...

Configuration Files | ... Options | ... This version of Apache includes changes allowing it to run on IBM's EBCDIC-based TPF (Transaction Processing Facility) operating system. ... It is passed to Apache through the ZINET XPARM field since ZINET is the only way to start the server on TPF. A third group of options apply to both the informational displays (ZFILE) and running the server (ZINET XPARM): -d, -D and -f. The rest of Apache's options are either not applicable or are not supported on TPF. ...

... Field size . Object name . ... Map size . ... Field size: the approximate size of the map in the Y direction. ... Galaxies: . ... Galaxies, which size exceeds some value depending on the field and map sizes, are displayed with their real positional angles and sizes by 25m isophote. ... In the "tools" fields there are links to the several famous AVO (Astrophysical Virtual Observatory) resources: NED and Simbad databases and DSS2 (Palomar Digitized Sky Survey) images of the corresponding sky area. ...

... Meteors and Meteorites . ... By admin August 2, 2011 Posted in: August . 13 August 2009: A perseid flashes through the sky (Image credit: Andreas M?Єller via wikimedia.org) . ... Not all meteors are sporadic events, the regular meteor showers occur when the Earth bulldozes through a great swarm of meteoroids drifting in orbit round the Sun. ... They are at their best in the pre-dawn hours, as the face of the Earth turning towards the Sun catches more meteors as the Earth moves through space. ...

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... AstroImageJ (AIJ) .. ... Reads and writes FITS images with standard headers . ... Provides a time and coordinate converter tool with capability to update/enhance FITS header content (AIRMASS, BJD, etc.) ... Creates color images and with native ImageJ processing power . ... AstroImageJ_Updater . Update operation now updates AIJ version number in Info.plist CFBundleVersion and CFBundleShortVersionString (MacOSX only) . ... AstroImageJ is ImageJ with astronomy plugins and macros installed. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . In 1966 , the Earth passed right through the trail generated in 1899 (then 2 revolutions old), causing the most spectacular meteor display of the century. In 1999, the Earth again passes near the 1899 trail (now 3 revolutions old), but further from the trail's centre than in 1966. ... A fuller explanation of these trail cross section plots is available. Go to Armagh Observatory Leonid page . ...

FIRST SCREEN . ... Data necessary to continue to the next screen : profiles from calibration wedges (three at least), profile of quiet sun, coordinates of the solar region and heliographic latitude of the center of the solar disk. What to do : First of all you must fill in the region which the profiles should be taken from, by pressing the "range for profiles" button (only x positions x 1 and x 2 , x 1 2 ). Then use the "number of profile" button for choosing which wedge you are going to mark. ...

The Optical Solar Sensor (OSD) has been designed to determine the direction towards the center of the Sun's visible disc. The direction to the Sun is computed in the instrument coordinate system relative to the pixels' position on the linear CCDs illuminated with the light passed through the incoming coding mask. The OSD coding mask has three groups of slits with three slits in each group. This mask configuration provides for reliability increase as well as for the required accuracy. ...

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... Star Atlas . ... stars . ... Nuclear fusion of hydrogen into helium powers stars, but fusion requires a lot of energy. Where does this energy come from? ... You re in good company: This question also stumped the physicists who first tried to understand nuclear fusion in stars. In a star s core, all atomic nuclei have been separated from their electrons, so each hydrogen atom is really just a proton and thus holds a positive charge. ... Get instant access to subscriber content on Astronomy.com! ...

... Shuang Ma 7016 2.4G 3CH Waterproof Racing Boat Ready to Run with Display Rack . Type: RC Boats . ... Boat/Ship Power: Built-in rechargeable battery . ... RC Boats . ... Package Contents: 1 x Display Rack, 1 x Racing Boat, 1 x Transmitter, 1 x Charger, 1 x English User Manual, 1 x 9V Battery, 1 x 7.4V 1300mA Battery . English Phrasal Verbs in Use Intermediate is a vocabulary book for good intermediate level learners and above. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Flexible frame grabbing to PC over PCI bus from area & line scan cameras . ... Analog input up to 20 MHz and digital input up to 32 Mbytes/Sec. ... The LPG-132 will easily interface to virtually any analog or digital camera and provides lightning fast PCI transfers at an amazingly attractive price. The LPG-132 will interface with any camera or sensor at data rates up to 32 Mbytes/Sec. ... The LPG-132 comes in two configurations - one for analog input and the other for digital inputs. ...

... ASRAS Board Members . ... Site . ... ASRAS Board Positions . ... President - . ... The president has many responsibilities like running monthly meetings, running the monthly board meeting, representing ASRAS at local events like star parties, planetarium events, RMSC events, the monthly newsletter presidents message, etc .. ... The Vice Presidents position is mainly to assist the president and back them up if they cant make a major function like a general meeting or write the newsletter pres message...

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The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Interactive Java applets display the position of sun and moon on the horizon for any date, time and location, and on a world map with day and night regions. ... Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... On-line Data . ... The program enables to find out the exact present Earth coordinates of the international space station and "Shuttle". ... J-Track - this program is similar to the previous one, however it knows how to display images and orbits of space vehicles. ... NASA SkyWatch - a program for those, who are fond of watching artificial space objects through the telescope, field - glass or with the unaided eye. ... Info: Industry news On-line Data Company ATLAS news Events We in press Contact . ...