Complex sentence: He makes friends with fellow recruits William'Tex' Jarman, Venus-born Oscar Jensen, and Pierre Armand from Ganymede; his first roommate is Girard Burke, the arrogant son of a wealthy spaceship builder.
Split into simpler sentences: He makes friends with fellow recruits William'Tex' Jarman, Venus-born Oscar Jensen, and Pierre Armand from Ganymede. His first roommate is Girard Burke, the arrogant son of a wealthy spaceship builder.