Astrovisuals Moon Phase App and Star Chart App for iPod/iPad

Astrovisuals Moon Phase App and Star Chart App for iPod/iPad

Astrovisuals have converted their Moon Phase Maps and Star Charts to applications for the iPhone and iPad. Both apps provide all the great features of the original physical maps and have additional features added. Visit the Astrovisuals website for more details.

This app offers a very detailed series of charts of the night sky for observers using binoculars or a telescope. Prepared by famous celestial cartographer Wil Tirion, they present the entire sky in the form of 18 charts, 16 covering the equatorial region of the sky (8 each side of the celestial equator) and one for each of the Polar Regions.

The Star Charts can be viewed in positive (white on black) as well as the original negative (black on white) - the former being best for preserving night vision. The app also features the grid lines, constellation boundaries and object numbers and names as extra layers that can be added or removed as needed.

Features include:
* Stars down to sixth magnitude; double and variable stars included.
* All Messier objects, plus many NGC and IC catalogue objects.
* Auto detection of your location and presentation of the chart containing the sky directly overhead.
* Choice of positive charts (white on black, recommended to preserve night vision) or negative (black on white – easier to read and better for daytime use.)
* Charts can shown north up or south up to match your location.
* Search charts by constellation or major star name.

Extra layers can be added to reveal:
* Constellations boundaries for all 88 constellations.
* Grid lines and co-ordinates for every hour of Right Ascension and 10º of Declination.
* Star numbers and deep sky object names.

Not just a Moon Map! Rather a series of actual photos of the phases of the Moon with prominent features marked and named. This makes it easy to identify features on the Moon as you are seeing them as they really are, not as an idealized representation on a map. Each Map gives priority to features on the terminator (the line between day and night on the Moon), as the low sun angle makes them stand out more. As craters recede from the terminator they become less prominent and are generally not indicated.

The Moon Maps have an extra 12 images included to make 30 images all together, covering all phases of the Moon, waxing and waning. Maps can be viewed north or south up and also mirror-reversed for use with star diagonals at the telescope. Crater names, names of seas (in Latin or English) and smaller details (such as rilles and faults) feature as removable layers.

Opening screen shows the current Moon - navigate to other phases by swiping to each side then tap to reveal the detailed map of each phase. Layers can be added or removed depending on your requirements:

* For beginning observers using binoculars, just the names of seas can be revealed in Latin or English.
* For telescope users, the names of craters and other major features can be revealed.
* For advanced telescope users, an extra layer reveals smaller details such as Faults (F), Rilles (R) and Valleys (V).

Overall Features:
* 30 images of the Moon, 18 of the waxing moon, the Full Moon and then 11 of the waning Moon (there are less of these as they generally occur in the morning hours and are less often observed).
* Images can be shown North up or South up depending on telescope settings and location.
* Maps can be shown mirror reversed if required for your telescope orientation.
* Search for major feature names of waxing and waning Moon.