In 4 dagen in 20.000 circles? NASA bewijst dat op GooglePlus. http://thenextweb.com/google/2011/1… In 4 dagen in 20.000 circles? NASA bewijst dat op GooglePlus. http://thenextweb.com/google/2011/11/17/nasa-reaches-20000-followers-on-google-faster-than-it-did-on-twitter-and-facebook/