The Fission Theory: This theory proposes that the Moon was once part of the Earth and somehow separated from the Earth early in the history of the solar system.
When you actually use that class to make a THING, this is what you make. A method is a bit of code that can be called when needed (often as part of an class, but not always) Here's an example: I write a class called Ball. In my main code, I then write a=Ball.new, b=Ball.new, c=Ball.new.
In object-oriented languages, a class is a data type, and objects are instances of that data type. In other words, classes are prototypes from which objects are created. For example, we may design a class Human, which is a collection of all humans in the world. Humans have state, such as height, weight, and hair color.