Thread:Sci100/@comment-5543071-20141106014558/@comment-4050367-20141106110343

As long as

1) There isn't a page for it

2) The Earth-# hasn't been claimed by a show, or reserved by a user/wiki for an upcoming project on Project:BTFF Multiverse and Earth (disambiguation)

3) The Earth-# hasn't ben claimed by a show, or reserved by a user/wiki for an upcoming project on Template:Universe

Then you may have the Earth-#, and once you have the Earth-#, put the Earth-# on the three links above according to how they are formated.