Why ‘Mr. Astrophysics Head’?  There’s a story …   I have a brother who once, when his significant other was ‘advertising’ her success in coordinating all the wheels necessary to make a commercial (both are in the advertising business), commented, “Aren’t you little Miss Producer Pants”.  His significant other adopted that for her website.  My significant other heard this story and apparently remembered it.  When I was once going on, lyrically I might add, about the sky overhead, I ‘earned’ the comment “Aren’t you being Mr. Astrophysics Head!”   A website domain name for certain.