Kerbal Space Center
Located on Kerbin, The Kerbal Space Center (KSC) is currently the only location that missions can be launched from. As of 0.13.3, KSC featured a Vehicle Assembly Building and a launchpad. As of 0.16, KSC also includes a Tracking Station, Space Plane Hangar, and Runway.
Vehicle Assembly Building
The Vehicle Assembly Building is a large facility on the surface of Kerbin at Kerbal Space Center's launch complex. Rockets and other spacecraft can be designed vertically, making them different in that regard to machines put together in the Space Plane Hangar.
Tracking Station
The Tracking Station's purpose is to allow access and observation of all missions currently active, including splashed-down or landed ships. Note that this does not include crashed or otherwise ended missions, and is not available in the demo.
Space Plane Hangar
The Space Plane Hangar allows players to construct air- and spacecraft in a horizontal environment and proceed to launch them from a conventional runway.
Launch Pad
Launchpad 0.102668048653556°S, 74.5753856554463°W ~68.41 m altitude
Runway
Runway 0.0405816849745605°S, 74.6913027972574°W ~65.75 m altitude (west end) Aligned 90°/270° (facing 90° by default) ~1800 m length