Question: 1. Create a class called HeavenlyBody with the attributes mass and size. Create a subclass called Planet that contains an extra attribute called satellites, which

1. Create a class called HeavenlyBody with the attributes mass and size. Create a subclass called Planet that contains an extra attribute called satellites, which is a list of all the satellites (e.g. moons) that the planet has. Create another subclass called Satellite that has an extra attribute called planet_name that stores the name of the planet that the satellite belongs to as a string. Write the appropriate _init__str_ accessor, and mutator methods for these classes

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