Origin of my nickname

I got the name during a vacation in September 1992 on Big Island, Hawaii. We met a guy with whom I discussed a lot  about the Stars and the Universe (I was studying Astrophysics at this time).
Because we talked so much about the stars, this guy started calling me Starman. 

I then started using this name as callsign in various computer games. 

After I got my physics degree I left science and started a career in IT. 
The name reminds of my past and of what I gave up.

Only recently, I found out that there is a cartoon hero called Starman. My Nickname has nothing to do with this cartoon character. I am a real person.

That's why I sometimes call myself "the real starman".