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We are all voyagers on Spaceship Earth.
But when we leave it, we have to take with us the environment that nature has given us.
We must know where we're going, so we have to have computers and telescopes.
We have to build an artificial world in fact...
And when we'll be doing that, we'll travel out into the universe on voyages which may take Months to the nearer planets.
Years to the closest stars.
Thousands of years to the more distant stars and perhaps Millions of years to other galaxies.