Jupiter emits more light than it receives, that's right. But it has to be capable to fuse in order to be a star. It needs about 80 times more mass in order to do that.

You can't burn Jupiter, it is made of hydrogen which doesn't burn. You need oxygen which Jupiter doesn't have.

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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool.
-- Richard Feynman