Everything Old is New Again: Star Trek Conventions We just came back from the biggest Star Trek Convention in the world - VEGAS. In this, the first part of a three part series, we examine what it is about Star Trek that garners this much attention from their fans that there is a convention is held yearly that over 15,000 people attend. We bring you right there and begin the journey where no one or almost no one has gone before....and guess what, it's a blast.