Interstellar Travel is made possible through the use of Heaven’s Gates, and their connection to Gate Space. Mankind, and apparently The Observers, has never achieved faster-than-light travel. Thanks to the Gates though, man has reached numerous stars.
Gate travel has one horrifying Caveat though: Only a Gatekeeper can travel through Gate Space while still conscious. Any non-Gatekeeper is driven mad by the “Presence of God” while within Gate Space, an effect known as Awestruck. The Gatekeepers do not speak about what is in Gate Space to people who are not part of The Church, so it remains one of the scientific community’s greatest mysteries. Non-Gatekeepers can still travel through the Gates, but they must be rendered into a near-death state through the use of Stasis Pods, and then be shipped across like cargo.
When a person wishes to travel to another system, they book passage on-board a Starship, and that ship then travels to the local Cathedral Station, where they book passage for another star. The ships wait until a Church Carrier, can be assigned to them, and then they dock onto that carrier. When the Carrier has enough passengers to warrant a trip, the Station sends a Priest, and assistants to deliver Holy Communion to all of the passengers and crew. All travelers must take the Communion, whether they are Catholic or not, and be anointed with blessed oils upon the forehead. The Church insists that this ritual is absolutely necessary in order for God to accept the travelers trespassing on his doorstep, but many feel that this is just another way in which The Church reminds the galaxy of who is in charge.