A planet is an astronomical object orbiting a star or stellar remnant that
* is massive enough to be rounded by its own gravity,
* is not massive enough to cause thermonuclear fusion, and
* has cleared its neighbouring region of planetesimals.

The term planet is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate obj

Foundation (Foundation #1)
Foundation's Edge (Foundation #4)
Forward the Foundation (Foundation: Prequel #2)
Prelude to Foundation
Stranger in a Strange Land
Shadow of the Giant (Ender's Shadow, #4)
Ringworld (Ringworld, #1)
Matter (Culture, #8)
Hyperion (Hyperion Cantos, #1)
Naked Lunch
Xenocide (Ender's Saga, #3)
Heretics of Dune (Dune Chronicles, #5)
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