Science

CELESTIS-17 & SHERPA-FX1

Commercial Memorial Spaceflight (Passive Hosted Payload) · Celestis Memorial Spaceflights / Spaceflight Inc.

Celestis-17 is a hearse in orbit. Launched January 24, 2021 aboard Spaceflight Inc.'s Sherpa-FX1 orbital transfer vehicle, part of SpaceX's first dedicated rideshare mission, it carries a sealed container of small capsules, each holding a symbolic portion of someone's cremated remains — 104 people this time, sent up by Celestis, the commercial memorial spaceflight company that's flown loved ones' ashes since 1994, including on other missions a genuine Mercury Seven astronaut, an original Star Trek cast member, and Star Trek creator Gene Roddenberry alongside his wife Majel. Celestis doesn't build its own rockets; it buys a small slot on someone else's mission, riding along as what the industry calls a passive hosted payload — no power, no instruments, nothing to do but stay sealed and keep orbiting. Families can track the specific satellite carrying their loved one's remains passing overhead, and Celestis guarantees a free reflight if a mission fails to reach orbit. It's a strange, sincere answer to a question spaceflight rarely gets asked: what happens after the mission is over, for the people who never stopped dreaming about it.