Planeta 42 is an imaginary planet, where real knowledge is obtained, through gaming. Why is it a planet? Because planets are places to gather people. It may as well be room 42, club 42, or house 42. Also, the planets may have satellites or moons. For Planeta 42, every major knowledge subject is situated on a different moon. Why is it 42? Because we believe the "The answer of Life, the Universe, and Everything" is knowledge. The dinosaurs have lived millions of years and they probably never have asked that question to themselves. And that is, probably because they knew nothing. Why is it Planeta? It is a fun reference for more languages.
How was Planeta 42 formed? We have long thought about what is the best place for our fun educational games.
It wouldn't be a warehouse, where gadgets are just stored, nor a marketplace, where items are bargained. It wouldn't be a gallery, where only observed, nor it be a school, only for learning. We decided it would be a planet! A planet may be visited for all those purposes above, and yet do not distract the visitor from his/her personal adventure of exploration. It is just an imaginary planet. It stays there in the virtual world of the internet, hiding interesting knowledge and lore.*
*Information courtesy of http://planeta42.com/domain.html