Pegasus on kolme- või neljaastmeline tiibrakett, mis viiakse transpordilennukiga mitme kilomeetri kõrgusele. Pegasus suudab kanda umbes pooletonnise lasti madalale geotsentrilisele orbiidile.
Payload was originally a seafaring term for revenue-producing cargo on a ship. In space terms it refers to those elements of the spacecraft specifically dedicated to producing mission data and then relaying that data back to Earth.
