SOLAR SYSTEM

Detailed explanation-1: -Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. With the rise of the sun, the remaining material began to clump together. Small particles drew together, bound by the force of gravity, into larger particles, according to the core accretion model.

Detailed explanation-2: -Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova.

Detailed explanation-3: -Turbulence within the cloud causes knots to form which can then collapse under it’s own gravitational attraction. As the knot collapses, the material at the center begins to heat up. That hot core is called a protostar and will eventually become a star.

Detailed explanation-4: -According to the nebular theory, stars form in massive and dense clouds of molecular hydrogen-giant molecular clouds (GMC). These clouds are gravitationally unstable, and matter coalesces within them to smaller denser clumps, which then rotate, collapse, and form stars.

Detailed explanation-5: -Gravity tries to squeeze an interstellar cloud into an even more compact form while the collapse and in-fall of the gas converts gravitational energy into the gas pressure, thereby slowing down the collapse.