Space flight -- Juvenile fiction. Life on other planets -- Juvenile fiction. Heroes -- Juvenile fiction.

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Astronauts -- Fiction Life on other planets -- Fiction Human-alien encounters -- Fiction

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Exobiology Life on other planets Life -- Origin

Vader, Darth (Fictitious character) -- Fiction Life on other planets -- Fiction Space warfare -- Fiction Good and evil -- Fiction Science fiction

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Life on other planets Life -- Origin

Imaginary wars and battles -- Juvenile fiction Life on other planets -- Juvenile fiction Adventure and adventurers -- Fiction Extraterrestrial beings -- Fiction Science fiction