The new version of the Interactive Sky Chart runs natively in the browser, no plugin required.
#ASTRONOMY SKYCHART SOFTWARE#
We made the move because Java was never supported on iPhones or iPads, and some browsers, such as Chrome and Firefox, have also stopped supporting the software plugin.
#ASTRONOMY SKYCHART CODE#
The biggest development is that we’ve moved the code base that runs the Interactive Sky Chart from a Java-based platform to an HTML5 platform. DownloadĮndless thanks and gratitude to the creativeness of Mr.At long last, I’m proud to announce the release of Sky & Telescope’s much-loved Interactive Sky Chart! We worked with Chris Peat ( ) to make a number of changes - the vast majority of them under the hood - so that you’ll have a reliable sky chart that you can take with you into the night.
Instructions are provided to enable the macros activation and resize the maps. The software shows the animation of the stars in the sky - day and night during the animation times are expressed in the time of the Time Zone. The sky map (an indispensable tool) allows the user to plan the star sight: fast choosing and optimizing. The sheet ( printable as a A4 format) portrays all astronomical/nautical events and the following data for sixty-six nautical stars (Sun included) : apparent magnitude, precise altitude above the horizon and azimuth. – (Greenwich Mean Time) – latitude and longitude. In this sheet the user has to enter these data: year, month, day - hours, minutes and seconds in U.T. The stellar planisphere in an excel file was created for Office 97-2003 (.xls) and for Office 2007 in a "binary" format (.xlsb) so the program can only be used with Office 2007 (or later) installed It is essential to enable macros before using the program (calculations and animation are not performed without activating the macro, see the instructions sheet “ Caution ”). Using this tool (freeware) the observer is sure to quickly find the stars (weather permitting). It solves this problem ensuring precision of 0,1 arcminute. Sometimes the stars are really hard to find !
T he approximation of the altitude to be set on the sextant can reach five degrees. Nowit can happen that the observer in latitude 40° North has to use the plate for 45° or 35°. The number of the plates (8) is insufficient t he interval of latitude between two plates should be reduced from 10 degrees to 5 degrees. Model 2102-D is the most important star-finder (two main plastic plates - eight plates for latitude North/South : 5°, 15°, 25°, 35°, 45°, 55°, 65°, 75°, 85° - size 12” diameter ). Seamen used various traditional star-finders and spheroscopes in the past nowadays few types of this tool are produced. To do that the altitude set on the sextant (Dead Reckoning Altitude) must have a maximum approximation of one degree. At the beginning of the nautical twilight, the stars cannot be seen by the naked eye but only with the telescope of the sextant. It's fundamental to sight the celestial bodies with a clear horizon. It allows to identify the brightest stars and to predict the position in the sky of the nautical stars not yet visible.
#ASTRONOMY SKYCHART MANUAL#
Stars identifier (marine stars searcher) - Day and night sky (skymap) in an "excel" planisphere (.xls/.xlbs) with animationĪn important manual tool for planning stars and Sun sights !
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