Since Jupiter is the biggest and most massive planet in the Universe, it is not uncommon for one to think of it as a mini-star. However, Jupiter is still much too small to ignite and generate nuclear reactions. However, the interior of Jupiter is very hot nonetheless, probably around 20,000 K and is produced by the Kelvin-Helmholtz mechanism. This process is the generation of heat due to the gradual gravitational compression of the planet. The heat generated also is the cause of the turbulent conditions that are observed on the surface. Saturn and Neptune, also gas planets are behave much in the same way Jupiter does in terms of heat generation but Uranus does not.
Looking back at the comparison between Jupiter and stars, one can see the obvious differences. Stars mainly are much more massive than planets, and in this case, Jupiter needs to be eighty times more massive in order to ignite like a star.
Can Jupiter become a Star 
