Solar System

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Orbit.py:

import turtle, time, random

SS = turtle.Screen()

SS.title('Solar System')

SS.setup(500, 500)

SS.bgcolor('black')

SS.tracer(0)

earth = turtle.Turtle()

earth.shape('circle')

earth.goto(-10, 180)

earth.color('green')

moon = turtle.Turtle()

moon.shape('circle')

moon.goto(-10, 180)

moon.shapesize(0.3, 0.3)

moon.color('grey')

moon.penup()

stars=[]

for i in range(40):

    star = turtle.Turtle()

    star.shape('circle')

    star.color('white')

    star.shapesize(0.07)

    star.penup()

    star.goto(random.randint(-250, 250), random.randint(-250, 250))

    stars.append(star)

sun = turtle.Turtle()

sun.shape('circle')

sun.color('yellow')

sun.shapesize(6, 6)

sun.goto(-10,0)

global x

x = 0

global y

y = 0

def MoveSS():

    global x

    global y

    for i in range(360):

        y-=13

        moon.setheading(y)

        moon.forward(10)

        moon.setheading(x)

        moon.forward(3)

        SS.update()

        earth.setheading(x)

        earth.forward(3)

        x-=1

        time.sleep(0.03)

        SS.update()

        for i in stars:

            i.goto(i.xcor()+3, i.ycor())

        for i in stars:

            if i.xcor() > 250:

            i.goto(i.xcor()-500, random.randint(-250, 250))

while True:

    moon.goto(earth.xcor(), earth.ycor()+50)

    MoveSS()

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