Ice dwarfs at the edge of the Solar System

Hecht, Jeff; Henbest, Nigel
July 1991
New Scientist;7/13/91, Vol. 131 Issue 1777, p24
Discusses evidence on the presence of ice dwarfs at the edge of the Solar System, lying beyond Pluto. Suggestion that the planets are merely the largest of a population of trillions of icy bodies; Data showing that the three outermost planets all show signs of collision with an ice dwarf body between 1000 and 2000 kilometers in diameter.


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