CAPE CANAVERAL, Fla. (AP) — Former NASA astronaut Buzz Aldrin was noticeably absent from a gala kicking off a yearlong celebration of the 50-year anniversary of the first moon landing, even though his nonprofit space education foundation is a sponsor and he typically is the star attraction.

The black-tie Apollo Celebration Gala held under a Saturn V rocket at the Kennedy Space Center on Saturday evening featured a panel discussion by astronauts, an awards ceremony and an auction of space memorabilia.

Hundreds of people attended the sold-out event, including British physicist Brian Cox, who presented Virgin Galactic founder Richard Branson with the ShareSpace Foundation’s Innovation award.