Question

About 4.6 billion years ago, the solar system was nothing more than a cloud of gas and dust known as what?

A. A solar universe

B. A solar Orion

C. A solar accretion

D. A solar nebula

Answer 1

the answer is D: Solar nebula

Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.

Answer 2

D. A solar Nebula

Step-by-step explanation:

Solar system was formed from a molecular cloud of dust and gas which is known as solar nebula. The matter of the nebula collapsed and contracted under its own weight and started spinning. More and more mass was gathered until it flattened into a disk with bulge in the center. The temperature and pressure rose, the nuclear fusion reaction started and the sun was born. The rest of the matter accreted into planets.