Browse all claims submitted to the Evidence Ledger. Each claim is evaluated by experts and linked to relevant concepts.
Mars EDL is widely recognized as one of the most demanding technical challenges for human Mars missions. The fundamental difficulty arises from Mars having enough atmosphere to generate significant ae...
Space radiation represents one of the most significant health risks for Mars-class missions, but the physics of the problem are well characterized and multiple mitigation strategies exist at varying l...
The fundamental technologies underlying ECLSS have been demonstrated at component and subsystem level aboard the International Space Station over more than two decades of continuous operation. The ISS...
No breakthroughs are needed but much engineering work remains to create sufficiently reliable environmental control and life support systems ECLS. In order to improve reliability for a long-duration...
The adaptive nut is the moving element that couples to the variable-pitch screw flights to generate axial thrust. Any coupling method that produces thrust also produces some opposing force drag / slip...
Statement The 100 kGy sterilization dose is equivalent to approximately 2.0 million years of natural Mars surface radiation exposure. Jezero crater surface materials have an age measured in Gyrs billi...
Statement Gamma irradiation of rock and regolith samples produces exogenous volatile species H₂, CO₂, CH₄, organic fragments that migrate into the headspace gas, contaminating indigenous volatile inve...
Statement Gamma irradiation at 100 kGy creates radiation-induced defect RID centers and color centers in mineral phases. Color centers F-centers, electron/hole traps at lattice sites alter the optical...
Statement 100 kGy gamma sterilization preserves the majority of MSR measurement objectives. The geological, geochemical, and isotopic techniques which constitute the bulk of the assessment are unaffec...
Statement Two classes of Raman spectral features survive 100 kGy gamma sterilization: aliphatic C-H bands ~2900 cm⁻¹, <6% variation to 150 kGy and macromolecular carbon D/G bands ~1350/1580 cm⁻¹, enab...
Statement At 50 kGy gamma radiation, aromatic amino acid fluorescence tyrosine, phenylalanine is reduced to 9–25% of original intensity, while PAH fluorescence retains ~50%. Evidence Blanco et al. 2...
Statement Raman carotenoid biosignatures show significant diminishment at 15 kGy and complete erasure by 150 kGy gamma radiation. Evidence Dartnell et al., 2012, Analytical and Bioanalytical Chemist...
Statement At 100 kGy gamma radiation, DNA is expected to fragment to approximately 35–50 base pairs bp average length, well below the >150 bp requirement for standard Next-Generation Sequencing NGS an...
Statement Crystalline mineral structures detectable by XRD, EBSD are preserved at gamma doses up to >1 MGy; amorphization requires significantly higher doses and is rapidly annealed at room temperatur...
Statement 662 keV gamma photons cannot induce nuclear transmutation; photonuclear reactions require energies ≥1.67 MeV minimum threshold. Isotope ratios are therefore intrinsically preserved. Eviden...
Statement For microbial inactivation, total absorbed dose determines lethality regardless of dose rate across a 5-order-of-magnitude range 0.37 to 36,000 kGy/h. "Dose is dose." Evidence "Hansen et a...
Statement Magnetic domain structure, remanent magnetization, and magnetic susceptibility are unaffected by 100 kGy gamma radiation, with experimental validation to 7,000 kGy 70× safety margin. Evide...
Statement Gamma radiolysis of water produces reactive species OH•, H₂O₂, H₂ with well-established G-values that can oxidize Fe²⁺ to Fe³⁺ in hydrous mineral phases. Evidence Spinks & Woods 1990, An I...
Statement Radiation drives organic molecules toward macromolecular structures, causing loss of diagnostic molecular features and spectral convergence. Different organic sources become spectrally simil...
The submerged acceleration section is the portion of the launch system responsible for horizontally accelerating the launch train, comprising the adaptive nut, launch sled, and spacecraft. This sectio...
There are 16,001 tiles...
The Elevated Evacuated Tube EET is a low-air-resistance corridor through which spacecraft fly to avoid aerodynamic drag and heating in the densest part of the atmosphere. Unlike the horizontal acceler...
A fully and rapidly reusable, two-stage, methane-oxygen launch system can be sited at Kennedy Space Center in a manner that permits both stages to return to the launch site after every mission. The fi...
The spacecraft remains attached to the launch sled as it accelerates in the horizontal acceleration section and then coasts up the ramp. It detaches from the launch sled at the end of the ramp. The sp...
CO2e Emissions for Chemical Rockets One proposal for establishing a human presence on Mars involves using a methylox-fueled heavy-lift rocket with refueling in LEO before departure for Mars. It is dif...
A sustained Moon-base or Mars-settlement program is plausibly a multi-decade to multi-generational endeavor: NASA’s Artemis planning explicitly frames the next decade as laying foundations for a “sust...
The VPSL system is composed of large, complex infrastructure elements that closely align with existing U.S. industrial capabilities, particularly in sectors that are currently underutilized or facing...
If the launch system is used to launch spacecraft to Mars, then launches will occur for a couple of hours around sunset, for about 14 days in a row during each launch season. Launch seasons occur once...
The Launch Train consists of three components: the fueled and loaded spacecraft, the launch sled, and the adaptive nut. The spacecraft mass is addressed in the separate claim entitled "Spacecraft Mass...
The mass-to-orbit ratio is a useful metric for comparing and contrasting the fundamental performance of two different rocket technologies. For one system to have a better mass-to-orbit ratio than anot...
The intent of this claim is to argue that the launch system’s rotating, magnetically levitated screws can function as a grid-scale energy-storage asset when the system is idle, and that this dual use...
In most siting scenarios, it is reasonable to assume that the submerged horizontal acceleration section can be protected from external hazards simply by placing it deep enough underwater that ships ca...
The intent of this claim is to show that the geometric straightness required for the underground ramp section of the launcher is achievable using existing tunneling, surveying, and track-adjustment te...
The intent of this claim is to argue that human travel to Mars is feasible using smaller spacecraft. If validated, this implies that the supporting launch infrastructure can be scaled for smaller vehi...
The Elevated Evacuated Tube EET is a type of aircraft, and like any other aircraft, it can operate in a wide variety of weather conditions. The Elevated Evacuated Tube EET is designed to remain airwor...
The spacecraft coasts weightless inside the Elevated Evacuated Tube and exits through the airlock into rarefied atmosphere. On egress it encounters aerodynamic drag; a restartable rocket engine counte...
The upward-acceleration target applies to the ramp that redirects the vehicle skyward after horizontal acceleration. Allowing up to ~17 g normal to the trajectory over a short, controlled interval ≈6....
The forward-acceleration target applies to the horizontal acceleration section of the launch system. Allowing 80 m/s2 of forward acceleration in addition to the up to 9.8 m/s2 of normal downward accel...
Defense of Claim: Indefinitely Operable Propellant Depot in LEO A propellant depot deployed in low Earth orbit can be designed to operate indefinitely by integrating proven subsystems into a coherent...
Showing 51–100 of 107 claims