main.py

from PyQt5 import QtWidgets
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication
from SolarSystem import SolarSystem


class MainWindow(QtWidgets.QWidget):

    def __init__(self):
        super().__init__()
        earth_speed = 0.98
        planets_list = [
            ['Sun', 15, 0, 0, Qt.yellow, []],
            ['Mercury', 1, 25, earth_speed * 4.147, Qt.darkYellow, []],
            ['Venus', 3, 50, earth_speed * 1.622, Qt.darkCyan, []],
            ['Earth', 3, 75, earth_speed, Qt.blue, [['Moon', 1, 12, earth_speed * 0.29, Qt.lightGray]]],
            ['Mars', 1.5, 110, earth_speed * 0.531, Qt.red, [['Fobs', 1, 12, earth_speed * 0.58, Qt.lightGray],
                                                             ['Demos', 1, 20, earth_speed * 0.45, Qt.lightGray]]],
            ['Jupiter', 33, 190, earth_speed * 0.084, Qt.darkRed, []],
            ['Saturn', 26, 290, earth_speed * 0.034, Qt.darkYellow, []],
            ['Uranus', 13, 390, earth_speed * 0.012, Qt.darkGreen, []],
            ['Neptune', 25, 450, earth_speed * 0.006, Qt.darkBlue, []]
        ]

        self.solar_system = SolarSystem(planets_list)


if __name__ == "__main__":
    app = QApplication([])
    window = MainWindow()

    app.exec()