Some bugs have been corrected.
Now compatible with Android 13.
Expanded the variable range of dates.
For some models, we have fixed the problem of crashing at startup.
The current local time button has been added to make it easier to find comet in the sky by holding the device over the head when you choose the comet.
For some models, we have fixed the problem of crashing at startup.
Comet's passing through date at perihelion or perigee is available for display on the screen.
When Comet passed the best time to view, the date you boot the app is set in the center of the Date and Time slide bars.
Comet Book is available in German language.
Using the “3D Solar System seen from Space” mode will allow you to view the motion of Comets and planets turning around the sun.
The program has been updated to meet the change of a data format of orbital elements for comet and some bugs have been corrected.
The URLs of our support page and privacy policy page were changed and some correctionshave been made to mend inconvenience.
Added to display privacy policy.
The Comet Book app clearly shows when Comets can be viewed and in which direction. The direction and elevation of a Comet can change noticeably in a day due to its fast apparent motion. The moon and a bright planet may be convenient as a guide to find the comet though they have large apparent motion, too.
This app determines where Comet is in the sky when it becomes visible at your observing site. You can easily start your observation of a Comet by using Comet Book as a guide to the direction and elevation of the comet.
In addition, the new “3D Solar System seen from Space” mode allows you to view the motion of Comets and planets turning around the sun. Please take a look the comet’s movement around our solar system.