Theoretical spherical region of icy planetesimals beyond the Kuiper Belt
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Related clues
- Theorised hypothetical spherical shell of icy planetesimals beyond the orbit of Neptune and the Kuiper Belt
- A mass of comets orbiting the sun far beyond Pluto's orbit, named after a Dutch astronomer
- Giant shell of frozen comet nuclei theorised to envelop the solar system beyond Neptune and the Kuiper Belt
- Solar system boundary
- The solar system's farthest-flung neighborhood (2 wds.)
Possible answers
- O
- O
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- T
- C
- L
- O
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- D