(I'm astrophysicist Neil deGrasse Tyson.) Some with billions, others with trilions of stars, these are the fundamental building blocks of visble matter in the universe; they come in many varieties including spiral, irregular & elliptical
[DOC] [TLE] Astrophysicist Neil deGrasse Tyson's one-man mission - CBS News [PAR] Mar 22, 2015 ... Tyson tells Charlie Rose about his fascination with the universe and his ... Neil 
deGrasse Tyson is on a one-man mission to change that.