Star Atlas

About Star Atlas Android App

The app has the functions as follows.
(1)The stars(brighter than magnitude 6.5) ,planets and constellations are shown in the direction that the device(smart phone or tablet) points.
(2)The app tells you where in the sky any constellation ,planets or star is.

How to use the app
1.You tap the [Star Chart] button on the screen shown after starting app, then the starry sky is shown.
2.The observation position and time is automatically set on starting app.
However you can set desired place ,arbitrary time(local time) with [Settings] page.
A negative value of longitude means west longitude.A negative latitude implies south.
Using [Settings]page ,you can also limit showing star magnitude and change displaying range of sky (smaller number of "distance" shows wider range).
[Settings] page is available by tapping [Settings] button on page shown after starting app, or "gear" mark in menu on [Star Chart] page.
3.Tapping "magnifying glass" mark in the menu on [Star Chart] page displays [Search star] page.
You tap the constellation or planet name you want to search in the list or input right ascension and declination of searching star or constellations and click [OK] button.
Then red arrow or blue line appears in the [Star Chart] page.You move smart phone/tablet device by following the arrow or line,and reach searching object.
The red arrow/blue line disappears by tapping again "magnifying glass" mark.
4.Planets of our solar system( From Mercury to Saturn) are displayed by colored dot.
The color of each planet is as follows.
Mercury ... pink Venus ... yellow Mars ... red Jupiter ... blue Saturn ... green
The moon is displayed by white circle(apparent size) and yellow circle(fixed size).

You can search the position of each planet and the moon by using [Search star] page.