... Connections (constellation) . ... AAS 221 . AAS 219 . ... Can we divine anything from the Twitter stream of the 221st meeting of the AAS ? Note that the AAS has declared #aas221 as the official hash-tag for the meeting (it's case insensitive for Twitter searches, so you can use #AAS221 too, but probably best to stick with lower case). ... When did people tweet about AAS 221? ... A look at who talked about or to who (a constellation of Astronomers) ; this is similar to the TAGS Explorer view. ...