In the category "Space" we currently track items of 366 persons. The most popular ones, by number of traded items, are:

Charlie DukeChuck YeagerGuion Bluford
Robert CrippenEd CharlesJ.T. Thomas
Jerry CarrScott CrossfieldEd Book
Michael CoatsJoe KittingerJames Van
J.R. RichardJoe EngleRobert Gibson
Bruce McCandlessStory MusgraveMike Mullane
Eileen CollinsTom McMurtry 

You can find all people that we're currently tracking items for in the alphabetical index:
A    B    C    D    E    F    G    H    J    K    L    M    N    O    P    R    S    T    V    W    Y