Answer:
heat and particles of a supernova push gas outwards to form the gas giant planets that exist today.
Step-by-step explanation:
The solar system formed about a 4.5billion years ago from a dense cloud of interstellar gas and dust, possibly due to the shockwave of a nearby exploding star, called a supernova. Therefore, the heat and particles of a supernova push gas outwards to form the gas giant planets that exist today.