Question

Which of the following is the earliest starting point for the formation of our Sun and planets?

a) The formation of the Milky Way galaxy.
b) The collapse of a giant molecular cloud.
c) The birth of the solar system's first star.
d) The condensation of the solar nebula.

Answer 1

The condensation of the solar nebula is the earliest starting point for the formation of our Sun and planets.

Step-by-step explanation:

The earliest starting point for the formation of our Sun and planets is the condensation of the solar nebula. According to the protoplanetary disk model, the Sun and planets formed from a spinning disk of gas and dust called the solar nebula.

As the nebula cooled, solid particles began to condense and collide, eventually forming planetesimals which then merged to form planets and moons.