Browse all claims submitted to the Evidence Ledger. Each claim is evaluated by experts and linked to relevant concepts.
Understanding the relationship between a mass driver's exit velocity and its cost is critical to evaluating its economic feasibility. In many electromagnetic mass-driver architectures, cost grows rapi...
Variable Pitch Screw Launch offers a compelling risk-adjusted return on investment by targeting one of the largest cost barriers in space development: the high cost of safe and sustainable transportat...
The screws contain electric motors that are responsible for accelerating the screws and flywheels to operational speed. As the screws and flywheels are supported by magnetic bearings and as they spin...
Wear Rate of Rockets Rocket engines accumulate wear as they convert chemical energy into thrust, and the vehicle’s structure endures continuous stress from high loads, vibrations, and, for reusable s...
When evaluating launch infrastructure, discussions often begin with the siting requirements of conventional rockets. These systems typically require coastal launch sites where no populated land lies d...
In the reference implementation of the VPSL system, the adaptive nut separates from the launch sled and spacecraft at the end of the forward acceleration section. While the sled and spacecraft continu...
The Variable Pitch Screw Launch system converts electricity into kinetic energy with electric motors before the spacecraft is launched. This kinetic energy is stored as rotational energy within the sp...
Although the Elevated Evacuated Tube would be designed with substantial redundancy in its terrestrial power generation, transmission, distribution, and lift-control systems, complete or partial loss o...
According to Counting stars and costs: An empirical examination of space launch cost trend at NASAhttps://www.sciencedirect.com/science/article/abs/pii/S0094576525002115... - NASA's launch cost incre...
The term "Unobtanium" originated in the 1950s as a humorous engineering term for a hypothetical, perfect material that was impossible to obtain or did not exist. Some infrastructure concepts populariz...
In the abort scenarios considered here, the assumed failure is an unexpected loss of forward acceleration. It is assumed that the adaptive nut and launch sled will remain magnetically coupled to the g...
When evaluating the feasibility of launching a high-velocity projectile directly into space, one of the main objections is that the lower atmosphere is simply too dense—producing extreme dynamic press...
The Variable Pitch Screw Launcher requires a long evacuated tube so that the launch train and vehicle can travel at very high speed without incurring prohibitive aerodynamic drag, heating, or acoustic...
The "runways" of the orbiting spaceport are tracks built into the major chords of a long horizontal truss. The natural orientation for such a truss -- i.e., the minimum energy orientation -- would be...
This claim asserts that during a launch season, the size of the daily launch window, when combined with strategies for altering the flight trajectories of launched spacecraft and rapidly resetting the...
With laser interferometry, an instrument consisting of three small steerable mirrors at the vertices of a 10 meter triangular frame will have an angular resolution for a laser point source of $5 \time...
An Elevated Evacuated Tube EET is a lightweight, vacuum-tube segment that extends the protected zero-drag flight corridor through the densest part of the atmosphere, so that the vehicle exits into the...
To exit the tube, the vehicle will pass through an already open fast-acting door first, and that door will start closing immediately. The other end of the airlock is covered with a burst disk. The amb...
Squirrel and bear hibernation induction literature Delta opioid receptor agonist studies e.g., H2S and DADLE research in rodents and larger mammals Stepwise cooling + metabolic suppression protocols...
Studies on human fasting, controlled hypothermia protocols, and meditation-induced metabolic suppression e.g., Benson et al. on relaxation response; research on Tibetan tummo practitioners Clinical l...
Statement G21's in-situ gamma sterilization architecture provides sufficient backward planetary protection assurance for Mars Sample Return. At the 100 kGy reference dose, known terrestrial organisms...
Statement NASA-STD-8719.27 §5.4.2.b requires sterilization and inactivation of bioactive molecules prior to Earth-Moon System entry, leveraging overkill levels of terrestrial sterilization. The stand...
Electromagnetic emissions can be assessed by identifying the sources of time-varying electric and magnetic fields, their frequency content, and the extent to which they are radiated or contained by su...
Statement Even the most radiation-resistant known organism, Deinococcus radiodurans, is effectively inactivated by 100 kGy gamma radiation. Horne et al. 2022 reported survival to 140 kGy, but only un...
This claim asserts that the screw flights along the entire length of the acceleration and deceleration sections can safely operate with a tangential tip speed of 525 m/s. This refers to the local surf...
Statement The mineral matrix surrounding organic molecules in Mars samples generates secondary radical species under gamma irradiation that enhance organic destruction rates by 1 to 2 orders of magni...
The Variable Pitch Screw Launch VPSL system can be understood as analogous to a nut driven along a rotating lead screw, with the key distinction that the screw’s pitch varies continuously along its le...
Historical precedent from the most successful long-duration space programs demonstrates the value of incremental development over monolithic "all-at-once" approaches. Phased architecture concept: -...
The legal environment for Mars operations draws from the Outer Space Treaty of 1967 which establishes that celestial bodies are not subject to national appropriation but does not explicitly address re...
Site selection for a permanent Mars base involves balancing multiple, sometimes competing, requirements: proximity to water ice deposits, safe and flat terrain for landing, adequate solar energy lower...
Psychological and behavioral health risks are consistently ranked among the top concerns for long-duration exploration missions. A Mars crew rotation, including transit, surface operations, and return...
The Earth-Mars communication delay, ranging from approximately 4 minutes at closest approach to 24 minutes at conjunction, fundamentally changes the operational paradigm from real-time ground control...
The operational concept for a permanent Mars presence assumes significant robotic precursor work before the first crew arrives, and ongoing human-robot collaboration during crewed surface operations....
ISRU is widely considered the single most important enabling technology for transitioning from sortie-class Mars missions to a permanent presence. Every kilogram of propellant, water, oxygen, or const...
Every major system required for a Mars surface presence, including ECLSS, ISRU, controlled-environment agriculture, communications, thermal management, and surface mobility, demands reliable and subst...
Complete food self-sufficiency is not a prerequisite for establishing a permanent Mars presence, but the ability to supplement pre-positioned and resupplied provisions with fresh food production is bo...
Decades of research aboard the ISS and its predecessors Mir, Skylab have produced a detailed understanding of how the human body responds to microgravity. The primary concerns for Mars-class missions...
The economic viability of a permanent Mars presence depends critically on transportation costs. A single crew rotation cycle requires Earth-to-orbit launch, trans-Mars injection, Mars arrival and land...
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...
Showing 1–50 of 104 claims