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Why isn't Jupiter a Star?

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Why isn't Jupiter a star ? Jupiter is bigger than some of the stars in the universe . The smallest star yet discovered is EBLM J0555-57Ab. In our solar system, there are two objects larger than this star. One is obviously the Sun. The other is Jupiter, with a mean radius of 69,911 kilometers . Also the gas giant, is mainly composed of hydrogen and helium. Then why is Jupiter a planet and not a star?  First  let us understand what makes a star a star:   A star is a huge celestial body made up of hydrogen and helium that emits light and heat from churning nuclear forges inside its core. In order for this fusion to occur, the star should be of a certain mass. Mass of a star is pivotal in dictating the course of its life.                                           Nuclear fusion in Sun Jupiter does not have enough mass to cause nuclear fusion. Hence, it is not a star. EMBLM J005-57Ab has mass 85 times that of Jupiter. This is as light a star can be.  Even though Jupiter isn't a star