Question

What is the solar nebula theory ?

Answer 1

Hint: A nebula is made up of dust and gas that can range in size from tens to hundreds of light years in distance. A galaxy is far bigger, typically spanning thousands or hundreds of thousands of light years. Along with stars, black holes, interstellar dust, dark matter, and other elements, nebulae are one of the many components that make up galaxies.

Complete answer:
The solar nebula theory states that the Sun, Planets, and the Solar System were created from a massive cloud of gas and dust. The molecular cloud dissolved under its own gravity, forming a star known as the Sun in the middle. The remainder of the gas formed a disk-like object around which planets formed as the disc began to rotate before collapsing. The Sun contains percent of the system's mass, and planets surround the Sun as the disc spins.

A cloud of gas and ashes, most likely leftover from a recent supernova, may have initiated the Nebular Theory. The nebula began to dissolve and condense, and this phenomenon lasted for a while. The future Sun gathered the majority of the mass in the nebula's centre, becoming a Protostar.

The nebular collapse resulted in three processes:
-Temperatures have begun to rise.
-The nebula in the sun was spinning more and faster.
-The disc of the solar nebula flattened.
-The solar system's current ordered movements are a direct product of the solar system's origins in a swirling, flattened cloud of gas and dust.

Note: In contrast to a star that is undergoing nuclear fusion, a protostar is an entity that has not seen nuclear fusion. When nuclear fusion occurs, a protostar becomes a star. The nebula most certainly flattened into a disc known as the Protoplanetary Disk, from which planets gradually evolved.