Dutch astronomer who first postulated the existence of a cloud in the most distant region of the solar system where long-period comets are thought to originate
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Related clues
- Astronomer who proposed the existence of a cloud of frozen comet nuclei beyond the Kuiper Belt
- Kind of cloud
- __ cloud: remote solar system region
- Astronomer who proposed the existence of an immense cloud of icy comets and matter leftover from the solar system's formation some 4.5 billion years ago
- Jan ____ has a very large cloud named after him
Possible answers
- O
- O
- R
- T