The Oort cloud is_____________ .
A) the asteroid belt
B) another name for the inner solar system, just before the Sun became hot enough for nuclear fusion
C) the outer solar system where planetesimals, rocky debris and comets orbit outside beyond the outer planets but cross into the inner solar system at times
D) an unusual type of cloud formed when meteorites strike Earth

Question

Quizplus · Accepted Answer

The Oort cloud is the outermost region of our solar system, composed of icy planetesimals, rocky debris, and comets that orbit beyond the orbit of Neptune. The Oort cloud extends from about 2,000 AU to possibly as far as 100,000 AU from the Sun. Comets from the Oort cloud can periodically cross into the inner solar system.

The Oort Cloud Is_____________