Sun jammer racing was a competitive activity where participants raced in solar wind-powered crafts known as Sun jammers. A well-known competition for sun-jammer racing was the Chandrilan Cometary Games. Janstren Brell, a con artist, and the "Red & Black League," a criminal syndicate, were involved in the infamous "Ursellin Sun Jammer Race Fixings" scheme.
The Kendamari Casinos in the Lol sector sponsored sun-jammer races each year, which drew in gamblers from nearby sectors to their gambling establishments.