This application is free and ad-based. There is an ad free app.

It's a consolidation of astrophysics formulae and get them into action through forms for calculation.
This way the formulae are given some action and some life.
Some topics in Astrophysics has its group of formulae , of course; therefore, each is accompanied with some information about it by clicking the menu button.

Please ask us for features that you think as an astrophysicist require to be added to this application.


Please notice since this is a free application, criticize it constructively since in the end the application is made for you. However, the newer formulae you ask us asked to add them, they will go into the paid version.

Please write the review in either English or Arabic. The computer translation is weak.

The app also has also an activity to count the stars .

Please don't forget to try our other applications.

Topics covered yet:
- Convert time units to degrees . This module can use your system clock also.
- Solid Angle Measurement
- Angular Distance Between Two Points On A Sphere
- Find The Date of Easter In A Year
- Find Day Number In A Year
- Convert Between Julian Date And GMT Date
- Earth Globe Formulae
- Conversion Between Equatorial And Ecliptic Coordinates
- Mean Sidereal Time At GMT
- Parallactic Angle
- Angular Separation Between Two Celestial Bodies
- Check If Three Stars Or Planets Make A Straight Line
- Precession Using Low Accuracy Method
- Coulomb's Law : force between two charges.
- Kepler's Law: Escape Velocity and Orbital velocity at any point on the orbit
- Star Counter: Use your camera to count the number of stars.
Notice:
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The application uses GPS. It's used only in taking the coordinates for the sake of calculations. If you are in doubt that we might steal your coordinates, you can use the manual input option. You have been warned. Thanks.

Ver 2.4.1:
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fixed the crash on GPS usage for Android newer than version 6.0
Ver 2.4:
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fixed a crash in LaneEmdenEquationSolver: banned the empty max_number_of_graphs EditText
version 2.2-4:
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Added support to tablets.

version 2.2:
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Added Lane-Emden equation, numerically solved.

version 2.0-1:
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Removed annoying ad related stuff
version 2.0:
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Added:
- Star Counter