A Platform is a large observation deck used by wealthy individuals to view spectacular events in space. They can be considered as space stations as they usually remain in a planet's orbit.
Platforms are owned by a major corporation, but no one from the corporation is ever on board the stations. Every part of them is automated and controlled by a computer so that nothing can go wrong, the nautical term being unsinkable. The only beings who serve on Platforms are the Steward and staff.
After the event is wittnessed and the guests depart, the Platform will shut down for maitenence.