Question

What does the Solar Nebula Disk Model propose in the context of celestial bodies?

a. It suggests a new classification of stars
b. It describes the formation of galaxies
c. It explains the origin of the solar system
d. It outlines the life cycle of a comet

Answer 1

The Solar Nebula Disk Model explains that the solar system originated from a rotating cloud of gas and dust, which collapsed to form the Sun at the center, while planetesimals formed farther away, eventually coalescing into planets and moons.

Step-by-step explanation:

The Solar Nebula Disk Model proposes that the solar system formed from a giant, rotating cloud of gas and dust called the solar nebula. The process began 4.5 billion years ago, leading to the creation of the Sun and the planets. As the solar nebula collapsed the material fell toward the center, increasing in temperature and causing most of the solid material to vaporize.

Eventually as the nebula cooled, solid particles condensed, forming planetesimals which are the building blocks of the planets and moons. This disk model not only explains the origin of our own solar system but also serves as a framework for understanding the formation of other planetary systems observed around young stars in space.