Which of the following statements about the Oort Cloud is incorrect?

Question

Accepted Answer

Correct answer: D. It has been directly observed through telescopes and contains approximately 1 trillion objects — The Oort Cloud remains theoretical and has never been directly observed; we infer its existence from comet trajectories and orbital studies. While estimates suggest it contains billions to trillions of icy bodies, these objects are too distant and too small to be directly observed with current technology, making option D the incorrect statement among the given choices.

Answer

A. It is a theoretical spherical shell of icy bodies surrounding our solar system

Answer

B. It extends approximately 100,000 to 200,000 AU from the Sun

Answer

C. It is the primary source of long-period comets

General Science - MCQ Practice Questions