Answer:
a. Planets fall into two major categories.
b. The Sun generates energy through fusion of hydrogen into helium.
c. The solar nebula collapsed due to gravity.
d. There are vast numbers of asteroids and comets.
Explanation:
- The four key features if the solar system are given as above and as they have led to the formation of the solar system.
- Most of the planets fall into two categories that are gaseous giants and the other terrestrial planets. As the effects of the solar winds from the solar chromosphere.
- The sun itself is running on the fusion of hydrogen and helium elements in its core and thus is fueled by this energy.
- The solar nebula was a cloud of dust and gases that itself began to spin and the small particles under the gravity were pulled closer.
- There are about 100 billion comets and asteroids in the solar system,