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- Biosphere 2
- Biotechnology
- Blacksmith
- Blast furnace
- Booster
- Boron
- Bosch reaction
- Brayton cycle
- Brick
- Bringing down Phobos
- Bringing up Phobos
- Burroughs Crater
- CHAPEA
- CREW 191 – ASIA TEAM
- Calcium
- Calcium carbonate
- Calcium sulfate
- Candor Chasma
- Cape Canaveral Air Force Station
- Carbohydrate
- Carbohydrates
- Carbon
- Carbon Dioxide Scrubbers
- Carbon Tetrafluoride
- Carbon cycle
- Carbon dioxide
- Carbon dioxide electrolysis
- Carbon fiber
- Carbon monoxide
- Carbon nanotube
- Casius quadrangle
- Catalyst
- Caves
- Cebrenia quadrangle
- Cellulose
- Cerberus Fossae
- Chaotic Terrain
- Charcoal
- Chemical propulsion
- Chlorine
- Chromium
- Chryse Planitia
- Cobalt
- Coke
- Columbus Crater
- Compost
- Compressed-air
- Compressed regolith
- Compression
- Concrete