Oort Ring
The Oort ring is supposed to be a enormous tank of asteroids but overall of comets. It should be located at about 50,000 astronomical units (UA) of the Sun (knowing that we consider that the furthest planet, Pluton, is at 3,000 UA from the Sun, and that one light year is equal to 63,241 UA). This ring would even be a sphere from some scientists, which should be the bordure of our solar system.
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