Various theories have been put forward for the formation of our Solar System. The most plausible of which concerns the accretion and nucleation of the rocky cores of various planets from a proto-planetary disk surrounding the sun when it was young.
Specifically, early in its development, the Sun is surrounding by a cloud of gas, particles, dust and rocks that orbits it in defined orbits that resembles that of our current Solar System. Through the process of accretion and nucleation, the dust, particles and rocks accrete to form planetesimals, which with increased in gravitational pull, attracts more of the dust and particles in the same orbital disk that ultimately results in a larger planetary body. These bodies subsequently grew and became planets.
In the case of the gas giants such as Jupiter, Saturn, Uranus, and Neptune, the large rocky cores of the planets provide sufficient gravitational pull for the attraction of gases, which significantly enlarged the planet size, and together with the low temperature that arises due to the far distance from the sun, results in the condensation of some gases such as nitrogen into ice.
Thus, it is unlikely as some theory speculated that Jupiter formed within the inner Solar System and migrated to the further reaches of the planetary system.
Collectively, gravitational pull is the key ingredient for the formation of the Solar System Specifically, a cloud of gas and dust orbits around the young Sun in defined orbits, where gravitational attraction of planetesimals pull in more dust, particles and rocks, that through the process of nucleation and accretion, forms the rocky cores of the planets. With the significant gravitational attraction of the rocky cores, gases are attracted to the planets and help builds the atmosphere of the different planets. Thus, the significant size and mass of the rocky cores of Jupiter, Saturn, Uranus, and Neptune, help attract substantial amount of hydrogen, helium, and other gases that together gave the four planets a large and thick atmosphere.
Category: space exploration, astronomy,
Tags: Solar System formation theory, planetesimals, rocky core, planets, gas giants, gravitational attraction, atmosphere,