In science fiction, space colonization is sometimes more benign. Humans find an uninhabited planet, and inhabit it. The colonization of Mars is an often-used example of this type of space colonization. In more recent science fiction, humans may create habitable space (by terraforming or constructing a space habitat) and call that a "colony".
On the other hand, if the planet is already inhabited, much less benign consequences ensue: indeed, some science fiction authors have used the colonization of alien planets by humans, or the colonization of Earth by aliens, to explore the real-world issues surrounding the phenomenon. Such works include those of Mary Doria Russell, The Sparrow and Children of God.
The ultimate form of space colonization is the Kardashev scale which assumes that a single dominant civilisation will take over all energy on one planet, then one star, then a whole galaxy full of stars. However, this would not necessarily be so if other species were to be discovered during a galactic expansion. This may require more than one species to share the galactic space with each other as they both develop.
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Famous quotes containing the word space:
“Our passionate preoccupation with the sky, the stars, and a God somewhere in outer space is a homing impulse. We are drawn back to where we came from.”
—Eric Hoffer (19021983)