The Frontier Threshold
The distinction between an aircraft and a spacecraft is a matter of both physics and international law. We define the various altitudes that determine whether a passenger has reached the "cosmos" or simply high-altitude flight.
The Kármán Line (100 km)
International standard (FAI). At this height, the atmosphere is too thin to provide lift for an airplane, and orbital speed is required to stay aloft.
US Military/FAA Line (80 km)
US standard for awarding astronaut wings. Virgin Galactic's VSS Unity often targets this altitude, classifying its flyers as astronauts in the US.
Comparison of vehicle apogees vs. boundary definitions.
The Commercial Fleet - An analysis of existing and defunct ventures, their technical foundations, and the time they spend in the void. Select a company to view the profile.
Company Profile
Technical Architecture
Mission Duration
Financial Performance
The Texas Hub
Texas has emerged as the definitive launch site for the next century of space travel. Why are companies flocking to the Lone Star State?
West Texas
Blue Origin (Van Horn)
Boca Chica
SpaceX (Starbase)
Geographic Utility
Southern latitudes offer a rotational boost to rockets. The open Gulf of Mexico allows for safe eastward launches and rocket stage recovery.
Regulatory Ease
Texas provides specific legislative liability protections for "informed-consent" participants, which is foundational for private spacecraft testing.
Land Accessibility
Vast uninhabited tracts permit experimental vertical landings and explosive testing without proximity risks associated with Kennedy Space Center.
Talent Concentration
Proximity to Houston's aerospace ecosystem and no state income tax attract the engineering talent required for high-frequency operations.
The Financial Ledger
Space tourism is transitioning from capital burn to revenue generation. We analyze market projections and the technical value proposition.
The Profit Problem
Most suborbital ventures failed because they could not reach a flight frequency that covers the $500M+ initial development costs. SpaceX succeeds because tourism is a marginal addition to their primary launch business.
Industry Forecast
Analysts project a $12B market by 2035. Growth is driven by the emergence of "Orbital Hotels" and private stations that extend the 15-minute joyride into multi-day stays.