most household applienes give off a humming noise, all these humming noises 'humm' in the key of c (believe me, me and my old music teacher checked like crazy).
guns 'n' roses never played the uk because they think we're all bastards.
in that song, you know he one "ground control to major tom" and so on...they got the name major tom because they saw a flyer for john majors father, (i think he was a trapese artist) and flipped it round, tom major>major tom.