Deletion of Class M planet

Comment: and then '''redirect''' to Circumstellar habitable zone  where it will make a very nice start of 'in popular culture' section. None of the keep votes above shows a single source which is reliable, independent and contains , nor is the current tiny substub giving the impression we have anything except passing mentions to work with. Yes, the term is occasionally used here and there, it doesn't make it |notable, and if all we can say is that this term is a term for a real world concept as used in Star Trek, well, that's hardly enough to work with
Stance: merge
Cited policy: Wikipedia:Notability (WP:SIGCOV||WP:GNG)