Space Habitation

Environmental Control and Life Support Systems (ECLSS) manage oxygen generation, CO2 removal, water recycling, thermal control, and waste management for continuous human habitation. Inflatable habitat modules (Sierra Space LIFE) expand to provide large pressurized volumes while fitting within rocket payload fairings during launch. Modular station architecture enables incremental construction, with individual modules launched and docked to create growing orbital facilities. Microgravity manufacturing leverages the absence of gravity and convection to produce unique pharmaceutical crystals, fiber optics, and advanced materials impossible to create on Earth. Radiation shielding protects crew from the space radiation environment that exceeds Earth's surface by orders of magnitude.

Axiom Space modules attach to the ISS initially, enabling commercial research and tourism missions (Axiom-4 launched June 2025) before transitioning to a free-flying station. Vast's Haven Demo became the first commercial spacecraft flown and operated independently, validating the company's station technology. Gravitics' StarMax module provides 400 cubic meters of volume (nearly half the entire ISS) in a single unit for Axiom's station architecture. Microgravity research on commercial stations enables pharmaceutical crystallization, protein structure analysis, and advanced materials experiments impossible in terrestrial laboratories. SpaceX's Deorbit Vehicle ($843 million) will safely decommission the ISS through controlled re-entry over the South Pacific.

The space habitat market reached $4.5 billion in 2025 at 21% CAGR. Space tourism reached $1.6 billion growing to $46.8 billion by 2034. NASA's CLD program provides $2.1 billion over 5 years with $1.5 billion Phase 2 contracts. Vast raised $500 million at $2 billion valuation. Axiom raised $450 million (2025-2026). Sierra Space holds $1.43 billion in NASA obligations. SpaceX contracted for $843 million ISS deorbit vehicle. Gravitics won $125 million Axiom contract.