Question

most long-period comets we observe in the universe supposedly originate from which hypothetical cloud made of icy objects that lies surrounding the sun in our solar system?
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Answer 1

the Oort Cloud

Though long-period comets observed among the planets are thought to originate in the Oort Cloud, no object has been observed in the distant Oort Cloud itself, leaving it a theoretical concept for the time being. But it remains the most widely-accepted explanation for the origin of long-period comets

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Answer 2

Answer:

most long-period comets we observe in the universe supposedly originate from which hypothetical cloud made of icy objects that lies surrounding the sun in our solar system?

Explanation:

the Oort Cloud

Though long-period comets observed among the planets are thought to originate in the Oort Cloud, no object has been observed in the distant Oort Cloud itself, leaving it a theoretical concept for the time being. But it remains the most widely-accepted explanation for the origin of long-period comets.