Terrastronaut

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 1, 2012