Does building a base on the Moon increase the total mass throughput humanity can deliver to elsewhere in the solar system — and at cosmic scales (Tt/yr), what constraints bind first on each side?

## Abstract The EPA's March 2023 Oxygen Supply Chain Profile is the canonical U.S. government characterisation of the industrial oxygen sector. The report's load-bearing figure for our analysis (as cited in…

## Abstract Larson et al. (2017) used a chemistry-climate model to study extreme launch rates (10⁵-10⁶ launches/yr) with hydrogen-propellant launch vehicles — the closest peer-reviewed analog to a future methalox-dominant launch regime, since both lack chlorine and produce…

## Abstract Ryan et al. (2022) quantified per-fuel-type pollution emission factors and radiative forcing for the 2019 rocket launch fleet plus space-tourism extrapolations. The paper provides the canonical emission factors per kg propellant burned for kerosene/HTPB, hypergolic,…

## Abstract Murphy et al. (2023) detected metals from spacecraft reentry in stratospheric sulfuric acid aerosol particles using single-particle mass spectrometry on flights at 11-21 km altitude. **Approximately 10% of stratospheric sulfuric acid particles larger than 120 nm…

## Abstract Revell et al. (2025) used a coupled chemistry-climate model to project the impact of rocket launches on stratospheric ozone recovery over the period through 2030. The paper builds two scenarios: a "conservative" projection of 884 launches per year and an "ambitious"…

## Abstract Maloney et al. (2025) modelled the stratospheric and mesospheric impact of projected satellite reentry alumina at the 2040 launch cadence (assuming ~60,000 LEO satellites with ~5-year lifespans → ~30,000 reentries per year ≈ one reentry every 1-2 days). **The…

## Abstract The U.S. Energy Information Administration publishes annual natural gas consumption data through the Natural Gas Navigator. Most-recent annual total: 33.52 trillion cubic feet (33,522,688 million cubic feet) in calendar year 2025, released May 29, 2026. The figure…

## Abstract Kukreja et al. (2025, MIT/GMU preprint) conducted a life-cycle assessment of GHG emissions for 10 launch vehicles and 15 megaconstellation deployments, developing the open-source ORACLE repository. The headline finding: **megaconstellations launched since 2019 will…

## Abstract The thermodynamic minimum work of separating oxygen from air at standard conditions is approximately 51.3 kWh/t O₂ (192 MJ/t). This is the Carnot-limit floor: it cannot be reduced by any conceivable process improvement. Modern cryogenic air-separation units operate…

## Abstract Benzinga's 4 January 2026 piece reports an Elon Musk statement on X agreeing with a poster's framing that SpaceX could "ramp up Starship production in the future, similar to how aircraft manufacturers do." Musk's number: "maybe as high as 10,000 ships per year." No…

## Abstract Air Liquide's 24 June 2024 announcement of its Baytown, Texas, low-carbon oxygen production facility provides a concrete tier-C anchor for the capex of large-scale ASU capacity. The facility will be built at ExxonMobil's Gulf Coast site (Baytown TX), comprising four…

## Abstract Thunder Said Energy's air-separation-unit economics summary establishes baseline economics for cryogenic ASUs used in industrial-scale oxygen production. Capital cost is benchmarked at approximately $200/(tonne O2 per annum) of capacity, with modern plant scale…

## Abstract Mobius Risk Group's energy-market analysts assess the natural-gas and oxygen demand implied by SpaceX's aspirational Starship launch cadence. They model a full Starship + Super Heavy stack as consuming approximately 4,600 metric tons of propellant per launch (3,400…

## Abstract The global automotive industry produces approximately 80 million passenger-car engines per year. Individual Global Engine Manufacturing Alliance plants are capable of 420,000 engines per year each; a four-plant GEMA network produces ~2 million engines/year. The…

## Abstract Global helium production in 2025 stands at approximately 190 million m³ (≈32 kt at 0.166 kg/m³ density). Supply is geographically concentrated: US 38%, Qatar 21%, Algeria 11%, Russia 7%. Spot prices have risen from $380/MCF (2024 avg) to $450/MCF (Q1 2025). The US…

## Abstract Handmer's May 2026 lunar-mass-driver design post is most relevant to q6, but contains one passage directly relevant to q1: his Earth-launch counterfactual sizing. To deploy 1 TW of orbital solar capacity per year via Earth launch, Handmer estimates "67,000 launches…

## Abstract Spaceport site selection is bounded by overlapping geographic, regulatory, and political constraints. The single most important factor is latitude: rockets launched near the equator gain ~465 m/s of "free" eastward velocity from Earth's rotation, reducing propellant…

## Abstract Casey Handmer's October 2021 essay frames Starship as a discontinuous shift in the launch industry's industrial logic, comparable to the transition from pre-industrial steel weapons to industrially produced ones. He argues that Starship's economics push the…

## Abstract The SDC project's internal compilation aggregates and cross-references the primary industrial-input constraints for Starship-cadence scaling. As a workspace-internal source it is treated tier-C: a synthesis layer over primary tier-S/A/C citations, useful as a…

## Abstract Terraform Industries' master plan describes commercial production of synthetic methane via direct air capture of CO₂ combined with electrolytic hydrogen (Sabatier reaction → CH₄). Their proprietary DAC concentrates CO₂ for less than $250/t; green hydrogen for less…

## Abstract GMK Center's December 2024 infographic reports global stainless steel production statistics for calendar 2023-2024. Global stainless output grew 7% year-over-year to 62.621 million tonnes in 2024, up from 58.4 Mt in 2023. China dominates at 39.44 Mt/yr (63% of…

## Abstract Wikipedia's Raptor entry consolidates publicly-stated specifications and production-rate context. Raptor 3 (May 2026 update) at sea level: 250 tf nominal thrust (2.45 MN; 551,000 lbf), 1,525 kg mass, 330 bar chamber pressure, methalox propellant at 3.6 mixture…