Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
A comet with a long orbital period
B
A meteorite found on Earth
C
A planet in the asteroid belt
D
A satellite orbiting Mars
Understanding the Answer
Let's break down why this is correct
Answer
The Oort Cloud is a distant, spherical shell of icy bodies that surrounds the Sun at roughly 50,000 to 100,000 astronomical units. Its most important constituents are long‑period comets, which are made of frozen gases and dust and are pulled into the inner solar system by gravitational disturbances. These comets are the primary source of the spectacular bright objects that appear in the night sky from far out in the solar system. For example, the comet that appeared in 1997 (C/1997 B1) was thought to have come from the Oort Cloud, showing how these icy bodies are key components of that reservoir.
Detailed Explanation
A comet that takes many years to travel around the Sun originates from the farthest reaches of our solar system. Other options are incorrect because A meteorite that lands on Earth comes from rocks that broke off from asteroids or planets, not from the outermost icy cloud; A planet that sits between Mars and Jupiter is part of the asteroid belt, a region of rocky bodies.
Key Concepts
Oort Cloud
Comets
Solar System Formation
Topic
Solar System Reservoirs
Difficulty
easy level question
Cognitive Level
understand
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