Solar sail is a photo-sensitive sheet kilometers across which uses the radiation pressure of starlight to propel a spaceship.
Space elevator is a mechanical construct that allows a vessel to travel along a cable from Earth into space, escaping the atmosphere without extreme propulsion.
Human Mars mission is when humans fly to Mars.
A lunar outpost is a station on the surface of the moon that houses humans or robots on a permament basis.
Space tourism is travel in space for recreational or business perposes.
In sub-orbital spaceflight the vessel reaches space but returns directly without actually entering space.
Commercial spaceflight is flight above 100 km (62 mi) Earth altitude conducted by and paid for by an entity other than a government agency.