Summary
RedShift
Astronomical
Aviation
Encyclopedias
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Show the last entries for a time period:
 IndexSolar SystemHypothetical planets
Hypothetical Planets
Stories (20 URLs) about objects that were once thought to exist by astronomers, but which later 'vanished.' (by Paul Schlyter)
 
Hypothetical Planets
The same as the previous page, but only 10 URLs. Bill Arnett converted text by Paul Schlyter.
 
Hypothetical planetary object
An article on hypothetical planets by Wikipedia, the free encyclopedia.
 
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