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noun.
An Earth-dwelling voyager who travels through space using the planet as his/her ship.

A low-tech astronaut.

A terrastronaut may be considered a globe trekker with an interest/fascination/fixation on outer space.
A general explorer and/or adventurer.
I'm a terrastronaut; the world is my ship.
Yarr!
by Zed the Phantom January 01, 2012
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