from visual import *
scene=display(title="Universe!",x=0, y=0, width=800,
              height=600,range=vector(500000000,500000000,500000000),
              center=vector(0,0,0))

t = 0.0
dt = 10000 #change in time
sMoon = vector(384472282.0, 0.0, 0.0)
sEarth = vector(0.0,0.0,0.0)
v = 1023.41 #avg velcoity of moon
r = 384472282 #distance between earth and moon


Moon=sphere(pos=sMoon,radius=4000000,color=color.white, make_trail=True, trail_type="points", interval=10, retain=500) #moon model with trail
Earth=sphere(pos=sEarth, radius=90000000, material=materials.earth) #earth model

while t < 5000000: #time for program to run
    rate(50)  # This slows down the computer to 50 frames per second
    sMoon = (cos(v*t/r)*r,sin(v*t/r)*r,0) #calculates the position of the moon
    Moon.pos=sMoon #updating moon's position
    t = t + dt #updating time