This is attained in Goat Ville.
From the start, head into the garage nearest your spawn. You'll find a flowing blue disk, which you'll want to lick. Now go back outside, into the large field and you'll find a crop circle with two wooden beams. Walk over the empty beam and the blue disk will attach to it, now just wait about 30 seconds for a spaceship to arrive. Once it arrives, there will be a beam of air that you need to jump into, and then you will be transported to space, gaining the achievement.
*Posting for MAKA91, because he is only playing the Xbox One version.