Editing Orrery

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==== Celestial Navigation ====
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==== Sextant Navigation ====
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[[Image:orrerySextantFullList.png|thumb|200px|alt=Screenshot of the Celestial Navigation Default Page|Celestial Navigation Default Page]]
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[[Image:orrerySextantFullList.png|thumb|200px|alt=Screenshot of the Sextant Navigation Default Page|Sextant Navigation Default Page]]
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The Celestial Navigation page shows the information needed to perform [[wikipedia:Celestial_navigation|celestial navigation]] calculations with a [[wikipedia:Sextant|sextant]].  The default page, shown on the right,  shows the information presented by the [[wikipedia:US_Naval_Observatory|US Naval Observatory]] on its online calculator (located at http://aa.usno.navy.mil/data/docs/celnavtable.php).
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The [[wikipedia:Sextant|Sextant]] Navigation page shows the information needed to perform [[wikipedia:Celestial_navigation|celestial navigation]] calculations with a sextant.  The default page, shown on the right,  shows the information presented by the [[wikipedia:US_Naval_Observatory|US Naval Observatory]] on its online calculator (located at http://aa.usno.navy.mil/data/docs/celnavtable.php).
The orrery does not use that Naval Observatory calculator; it calculates the values itself (so you do not need an internet connection to use it).  The orrery uses the same list of objects as the Naval Observatory calculator, but it color-codes them differently for improved visibility.  Solar System objects are shown at the top of the list in red.  Objects with elevations between 15 and 65 degrees are shown in green, and objects above the horizon but outside of that range are shown in grey.  Data for Polaris and the First Point in Aries are shown at the bottom of the table, in white.  The values are not updated as time passes unless you press the "Press Here to Update" button at the bottom of the page.
The orrery does not use that Naval Observatory calculator; it calculates the values itself (so you do not need an internet connection to use it).  The orrery uses the same list of objects as the Naval Observatory calculator, but it color-codes them differently for improved visibility.  Solar System objects are shown at the top of the list in red.  Objects with elevations between 15 and 65 degrees are shown in green, and objects above the horizon but outside of that range are shown in grey.  Data for Polaris and the First Point in Aries are shown at the bottom of the table, in white.  The values are not updated as time passes unless you press the "Press Here to Update" button at the bottom of the page.
If you need the reduction table values for some arbitrary time, you can of course use the normal method of changing the orrery's time, and then return to the Sextant Navigation page to see the appropriate values.
If you need the reduction table values for some arbitrary time, you can of course use the normal method of changing the orrery's time, and then return to the Sextant Navigation page to see the appropriate values.
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[[Image:orrerySextantSingleObject.png|thumb|200px|alt=Screenshot of the Celestial Navigation Single Object Page|Celestial Navigation Single Object Page]]
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[[Image:orrerySextantSingleObject.png|thumb|200px|alt=Screenshot of the Sextant Navigation Single Object Page|Sextant Navigation Single Object Page]]
Showing all of the navigational objects on one page requires a very small font, which is hard to read.  If you press the touchscreen near any of the objects, a white box will appear highlighting a selected object.  Releasing the screen will present another page showing the data for the selected object only, with a much larger, more readable font, as shown on the right.
Showing all of the navigational objects on one page requires a very small font, which is hard to read.  If you press the touchscreen near any of the objects, a white box will appear highlighting a selected object.  Releasing the screen will present another page showing the data for the selected object only, with a much larger, more readable font, as shown on the right.

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