No-hair theorem

The no-hair theorem is about black holes. 
Black holes can be described by just three visible properties: mass, electric charge, and angular momentum, or spin. 
The theory itself was first stated by Werner Israel, a Canadian physicist. Then John Archibald Wheeler said that black holes have no hairs. This gave the idea its name. What he meant was: except for these three properties, "no other properties can be got from a black hole". However, Wheeler said that Jacob Bekenstein coined the phrase.