Logic to get sun's mass from all planets
methods to calculate F given sunX and sunY
For loop to initialize F for every planet
Added method to calculate r, radistance from sun to planet center
getFx method
Added fx
Added fy
Calculate new velocity and time
New point
More calculation methods and for loops
Added t and T
Added Point class
Added .equals method
Modified constructor and variables for Point class
Added distance methods
Replaced distance calculation and invalid methods
New getter methods
Fixed errors