Queen's husband != King?

So Queen Elizabeth II of England, you know her. Did you also know she's married to a certain "Prince Philip, Duke of Edinburgh"?

So why isn't he the king? Someone explain this royal title business to me plox.

Looks like /pol/ doesn't include royalty. Oh well.

>>4
Phased out? Doesn't look that way from where I'm standing. http://en.wikipedia.org/wiki/Line_of_succession_to_the_British_Throne