Earth, other planets, and the rest of the solar system formed
A)at the same time as the rest of the stars in the galaxy.
B)millions of years ago from elements that have always existed.
C)from a giant nebula millions of years ago.
D)billions of years ago from elements created in previously existing stars.

Question

Quizplus · Accepted Answer

Earth, other planets, and the rest of the solar system formed billions of years ago from elements created in previously existing stars, which is known as the nebular hypothesis. The idea is that the solar system formed from a solar nebula, a rotating disk of gas and dust left over after the formation of the Sun, which eventually coalesced into the planets, moons, and other objects in the solar system.

Earth, Other Planets, and the Rest of the Solar System