 Among those posting and replying to messages have been former Apollo (EECOM flight controller) Sy Liebergot; Stephen Clemmons, a member of the Apollo 1 ground support crew; Project Mercury astronaut Scott Carpenter's daughter Kris Stoever; astronaut Pete Conrad's son, Pete Conrad, III; National Air and Space Museum curator Allan Needell, space historian Dwayne A.Day, "Who's Who in Space" authors Michael Cassutt and Rex Hall, Kraig McNutt of "Today In Space History," and The Surfaris' former bassist Andrew Lagomarsino, among others.A number of astronauts are known to be cS readers.