During the formation of the solar system, which planet came the closest to starting the process of nuclear fusion, which would have resulted in a second sun?

Question

Quizplus · Accepted Answer

Jupiter is the largest planet in our solar system, and it has a mass that is greater than twice the total mass of all other planets combined. This huge mass raised its internal temperature to over 10,000 kelvins, which is close to the temperature required for nuclear fusion to start. However, Jupiter did not have enough mass to achieve the density required for fusion to occur, preventing it from becoming a second sun.

During the Formation of the Solar System, Which Planet Came