I had thought that Timothy Leary’s ashes had gone up on a Celestis rocket, along with those of Gene Roddenberry and Gerard K. O’Neill. He must have left some behind.
From the linked source:
“Most of Leary’s ashes were sent into outer space in 1997, but Sarandon kept some. The ‘funeral’ comes shortly after Sarandon gushed about Leary in an interview with the Daily Beast.”