As that article mentions, JPL's exoplanet tourism posters preceded SpaceX's posters:
http://planetquest.jpl.nasa.gov/exoplanet_travel_bureau
In any case, no need to ask SpaceX, the posters were released into the public domain.
http://planetquest.jpl.nasa.gov/exoplanet_travel_bureau
In any case, no need to ask SpaceX, the posters were released into the public domain.
http://gizmodo.com/spacex-just-dropped-these-amazing-retro-m...