... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

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• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Bitesize Astronomy

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . The Armagh Human Orrery is the first large-scale outdoor exhibit to show with precision on the ground the positions of the main planets, a dwarf planet and two comets. It is an innovative education and learning tool designed to explain the motion of the planets around the Sun and the changing position of Earth, relative to those planets, as it too revolves around the Sun. ... The Armagh Human Orrery . ...

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• The Armagh Observatory Human Orrery
• Armagh Observatory Human Orrery

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

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• Bright planets meet at dusk | Astronomy.com
• What is the difference between a planetesimal and a dwarf planet? |
• planets | Astronomy.com

Astronomy Discussion Forums . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums . ... Note The Change . Forum List | ... Post Message | ... www.astronomy.net . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• The Astronomy Shop - Software - by Astronomy Net

... Ceres: Asteroid or Planet . ... Explanation: Is Ceres an asteroid or a planet? ... Pictured above is the best picture yet of Ceres, taken by the Hubble Space Telescope as part of a series of exposures ending in 2004 January. Currently, NASA's Dawn mission is scheduled to launch in 2007 June to explore Ceres and Vesta , regardless of their future designations. ... 2005 2006 . ... Publications with keywords: Ceres - planet - asteroid . Publications with words: Ceres - planet - asteroid . ...

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• Астронет > Ceres: Asteroid or Planet
• XWare > APOD

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... 2006 August 21 . Ceres: Asteroid or Planet? Credit: NASA , ESA , J. Parker ( SwRI ) et al. Explanation: Is Ceres an asteroid or a planet? ... Ceres , at about 1000 kilometers across, is the largest object in the main asteroid belt between Mars and Jupiter. ... Pictured above is the best picture yet of Ceres, taken by the Hubble Space Telescope as part of a series of exposures ending in 2004 January. ... Tomorrow's picture: double swirl . ... About APOD | ... NASA Official: Jay Norris. ...

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• APOD: 2000 January 31 - Snowstorm on Planet Earth
• APOD: 2005 November 2 - Epimetheus and Janus: Interchangeable Moons of Saturn
• APOD Index - People: Scientists

... Chapter 4: Solar System Targets > 4.2 Target Identification . ... The following information is required to identify and classify each target. ... For example, separate targets should be defined if you plan to take spectra of several different surface features on a planet, or if you plan to observe the same feature with different timing constraints. ... Description . PLANET . If the target is the center of a planet, enter PLANET followed by its name (e.g., PLANET JUPITER , PLANET SATURN ). ...

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• WFPC2 PSF Subtraction
• Changes to CALSTIS Software and STIS OTFR Products
• WFPC2 Header Changes due to OPUS 10.0 Update

Changing a World . What did the students learn from all this? ... The students found this unsatisfactory -- some of them would not be able to fit another astronomy class into their schedules, but they wanted to know about our planetary neighbors, and this project gave them the opportunity to find out without spending valuable class time on the subject. ... The students also learned to learn for themselves, perhaps one of the most important milestones during formal education. ...

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• ASP: An Ancient Universe - Changes in the Solar System
• ASP: Indiana Jones and the Astronomers of Yore
• ASP: Book Review

ATNF Home . About ATNF . ... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Staff list | Student list | ... Email discussion lists . ... Murchison Radio-astronomy Observatory . ... Australia Telescope Online Archive (ATOA) . ... Virtual Radio Interferometer . ... CSIRO ATNF Data Archives . ... http://www.atnf.csiro.au/_Mail_Archives/ivo/ . ... discussion, without having to be subscribed to the list. ...

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• Version 9.2
• Package: listw
• Luminosity dependent changes of pulse profiles in the X-ray binary GX 1+4

To see the manner in which position of planets and their coordinates vary with time click on icons with arrows Right or Left in menu bar. ... The current moment of time and object coordinates are therewith displayed. ... Clicking on icons with symbols of sun or crescent leads to appearance of images of the Sun or the Moon in that point of the sky which correspond to their coordinates in current moment unless it lies within not displayed region; see below). ...

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• AY2006 (preface)
• EPHEMERIDIES OF MINOR PLANETS (EMP)
• AY2008 (preface)

Modules | ... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Developer Documentation . ... This is a first attempt at writing the lessons I learned when trying to convert the mod_mmap_static module to Apache 2.0. ... create per-server config structures */ . ... merge per-server config structures */ . ... Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our mailing lists . ...

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• Current Journals and online accesses
• Changing the scheduler from round robin to shortest job first for kernel 2.0
• Neptune

... SciSim release covered by this note . ... Data-Analysis-with-SAS in a simple and standardised way, and should allow calibration experts to re-assess the reliability of the different elements of XMM-Newton simulations. ... Also, a release of all calibration files to be used in the reduction, through the SAS, of SciSim generated data, is coordinated with this release. ... Furthermore, two SAS tasks (odffix and epicproc) had to be updated to make possible a proper SAS data reduction of simulated data. ...

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• SciSim Changes v2.0.4
• Change history
• SciSim Changes v2.0.9

Modules | ... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Developer Documentation . ... This is a first attempt at writing the lessons I learned when trying to convert the mod_mmap_static module to Apache 2.0. ... So the name gets a small change from mmap_init to mmap_post_config . ... server_rec *s . ... server config */ . create per-server config structures */ . ... merge server config */ . merge per-server config structures */ . ...

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• Upgrading to 2.2 from 2.0 - Apache HTTP Server
• Gravitational Lensing by Stars

... The previous example, Chapter 12, "Expanding Colored Squares Example," illustrates how to expand and contract the clipping region of a layer without changing the wrapping width of the layer. This example illustrates how to capture mouse events so that the user can make a layer's wrapping width wider or narrower by dragging the mouse. ... how to capture mouse events for a layer . how to change the wrapping width of a layer by using the load() function . ... Capturing Events for the Layer . ...

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• Appendix B: Changes from CSS1
• Long description for change bar example

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• Kepler and His Laws
• The Wind Spacecraft
• Parallax

... 35 љ // The last variable is the userData pointer. 36 љ typedef void (*posFuncType)(double, double *, void *); . ... 81 љ Ring ( double radiusMin, double radiusMax, const QString &texname); . ... 181 љ virtual double getCloseViewFov ( const StelCore * core) const ; . ... 245 љ double getSpheroidAngularSize( const StelCore * core) const ; . ... 309 љ void drawOrbit( const StelCore * core, class StelRenderer * renderer); . ... 367 љ void drawHints( const StelCore * core, class StelRenderer * renderer,...

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• Stellarium: SpaceShipObserver Class Reference
• Stellarium: Planet::Vertex2D Struct Reference
• Stellarium: StelObserver Class Reference

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Space Flight . ... 6 Comments For those of you that are still bearing the psychological scars from PlutoтАЩs demotion from planet to dwarf planet a decade ago, here is news that may add salt to [ ] . Continue Reading.. ... No Comments New HorizonтАЩs arrival at Pluto this year, after a nine year-long traverse through the Solar System has revealed many new things about this little icy planet. ... Posted on September 12, 2014 | ...

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• The One Year Crew | Astronotes
• How has Mars changed over billions of years? | Astronotes
• Mars | Astronotes - Part 2

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• Flight to Mars: the Return Trip
• Inventory

On 1 February 2002 this Mirror was upgraded from NVSSlist v2.10 to NVSSlist v2.17 . ... This form searches the source catalog produced by the NRAO/VLA Sky Survey (NVSS). ... Object name [optional] : . ... Search radius and verification halfwidth in arcseconds [Optional] : . ... Enter a list of positions to search: . ... The contents of the NVSS source catalog and the techniques used by NVSSlist to derive error estimates and other parameters are described here. ...

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• OptInt PmWiki : Tech Meet 12 | History
• OptInt PmWiki : Changes From Pm Wiki 1
• OptInt PmWiki : Preliminary Design Review | History