Question

Which object(s) formed last in our solar system?

the Sun
the solar nebula
the inner planets
the planetesimals

Answer 1

Answer:planetesimal

Explanation:

Answer 2

Answer:

Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.  The solar nebula became hot and dense pulling in more gas. This flattened into a rotating disk. It spun faster and faster, forming the Sun.

Explanation:

The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and then the possible Planet Nine.

The solar nebula spun faster and faster and flattened into a rotating disk. Most of the gas was pulled toward the center, where it became hot and dense, forming the Sun.

Uranus and Neptune are thought to have formed after Jupiter and Saturn did when the strong solar wind had blown away much of the disc material. As a result, those planets accumulated little hydrogen and helium—not more than 1 M Earth each. Uranus and Neptune are sometimes referred to as failed cores.