Create a program that calculates the next syzygy of four planets?

Create a program that calculates the next syzygy of four planets:
Assumption: Orbits are circular
Input: text file provided detailing planet, Orbitalradius, Orbital velocity, current position
Parameter Input: within a given error
Period of Interest: 10,000 earth days.


Text file: sysygy.txt
Mercury 36800000 107082 180
Venu 67200000 78337 355
Earth 93000000 66615 0
Mars 141600000 53858 250

I am facing problem to update position of planets after one second? what would be the position of each element after every second in a loop?
Assuming circular orbits and the length units for radius are the same as those implicit in the velocity ...

Angular velocity (in radians per second) is (OrbitalVelocity)/(OrbitalRadius)
So,
angular velocity (in degrees per second) is (180/pi)*(OrbitalVelocity)/(OrbitalRadius).
So, after one second, the "current position" - which appears to be in degrees - will advance for each planet by
(180/pi)*(OrbitalVelocity)/(OrbitalRadius)

Make sure that every time you pass 360 degrees you knock 360 off.

Sysygy (wow, 6 consonants, no vowels!) occurs when all your planets are lined up, so will either have the same angular position, or one differing by 180 degrees.
Thanx very much sir,,,!

You are awesome.

There were days I loved physics.
But m in Computer Science.
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