Radiation - Robert Braeunig TLI critque by AULIS
The Aulis critique (by Xavier Pascal and editors, with input from Jarrah White) contains numerous inaccuracies, misrepresentations, selective omissions, and misunderstandings of both the science and Braeunig's actual claims. It often attacks a strawman version of Braeunig's work while mixing valid broader points about radiation variability with errors on the specifics. Braeunig's 2014 article (archived version) is a detailed, quantitative analysis using standard models (AP-8/AE-8), Apollo trajectory data, and physics-based dose calculations. It is not flawless but is far more rigorous than the critique suggests.Web.archive
I'll break this down point-by-point, focusing on the core claims in the Aulis article regarding trajectory, timing, belts, latitudes, diagrams, and doses. (I cross-referenced the full pages via tools.)
1. Trajectory and Latitudes: "Apollo never exceeded ~30° latitude, so it couldn't avoid the dangerous parts"
● Aulis claim: Apollo 11's path stayed below ~60° N/S (Van Allen's "cones of escape" where radiation drops), so it plowed through intense regions. Braeunig's plots (showing a path avoiding the "heart") are fake/misleading and don't match NASA data (e.g., TLI NE of Australia at low latitude).Aulis
● Reality/Check: This misrepresents both Van Allen's statements and orbital mechanics. The belts are not uniform; intensity peaks near the magnetic equator and drops with magnetic latitude (λ). Trajectories with inclination (~30-33° for Apollo 11 outbound) reach higher magnetic latitudes as the spacecraft moves, especially given the ~11° tilt of the geomagnetic axis in 1969. Braeunig explicitly calculates this using B-L coordinates (magnetic field models), showing the path skirts the densest proton/electron regions.Web.archive NASA data (TLI at ~10°N geographic, ~165°E) and the ~32° inclination produce a path that does not stay glued to the magnetic equator. Braeunig's plots (distance vs. magnetic latitude) reflect this. Aulis confuses geographic latitude with magnetic latitude and ignores how the outbound hyperbolic escape trajectory sweeps through varying L-shells. Van Allen himself noted rapid transits + inclination reduce exposure significantly (not requiring polar launches). Apollo trajectories were designed this way. Inaccuracy score: High. Aulis overstates the "must be >60°" requirement as absolute.
2. Timing and Distance Through the Belts: "Braeunig's 1h40m is too short; it takes much longer"
● Aulis claim: Braeunig's 10-minute markers and ~1.5-2 hour transit ignore NASA timelines (e.g., docking at ~6,000+ miles after ~51 min, S-IVB separation later, "barbecue mode" at ~11 hours). Spacecraft slows down; belts extend farther.Aulis
● Reality/Check: Braeunig distinguishes the intense core (where most dose accumulates, ~90 min outbound in his plots) from the full outer fringes (low flux, up to ~9-10 Earth radii or more). His figures note this explicitly: red dots mark time in the high-radiation zones; full transit to negligible levels is longer but contributes little dose.Web.archive This matches standard descriptions: rapid passage through the hazardous parts. Aulis conflates total time to "clear" a vaguely defined outer boundary (models vary; belts aren't sharp cutoffs) with effective exposure time. CRRES-era data and modern probes show variability, but Braeunig uses AP-8/AE-8 (solar max, relevant to 1969) for averages. Inaccuracy score: Significant—cherry-picking and conflation.
3. Belt Models, Variability, and "Injection Events"
● Aulis claim: Belts are far more dangerous/variable than 1960s models (CRRES 1991 event, new third belt in 2012, AX-8 outdated, high-energy electrons unknown). Apollo coincided with solar activity; "never well patrolled." Modern agencies avoid them.Aulis
● Reality/Check: Partially valid but overstated for Apollo critique. Belts are dynamic (solar flares, electron injections can pump up fluxes temporarily). AP-8/AE-8 are averages with known limitations; modern AE-9/AP-9 improve on this. However:
● 1969 was near solar maximum; Braeunig uses MAX models.
● Apollo dosimeters (and Zond biological payloads) reported low doses consistent with models for short, inclined transits.
● "Avoidance" was always part of the plan: inclination + speed. Variability exists, but no evidence Apollo hit a massive spike (doses were ~0.1-1+ rad skin, mission totals low).Smithsonianmag
● Modern caution for long-duration deep-space (Artemis, Mars) involves cumulative GCR + solar particles, not just a few-hour VARB pass. Short transits remain feasible with shielding.
● Aulis exaggerates to imply impossibility, ignoring that Soviet Zond missions succeeded biologically and Apollo had real-time monitoring. Inaccuracy score: Medium—valid on variability, inaccurate on implications for short Apollo transits.
4. Diagrams and "Cheats"
● Aulis claim: Braeunig's plots (beige outlines, side views, time markers) mislead; mismatch when scaled; ignore actual Moon position/constellations; theoretical vs. practical.Aulis
● Reality/Check: Braeunig's figures are simplified 2D projections (R vs. magnetic latitude) to show avoidance of cores—not full 3D orbits. He states they illustrate the concept for Apollo-like trajectories. Minor scaling/visual issues in critique don't invalidate the underlying B-L calculations or flux tables. Moon position/ephemeris arguments are tangential (free-return/circumlunar paths were used; actual targeting accounts for Moon motion). Inaccuracy score: Mostly nitpicking visuals over substance.
5. Dose Calculations
● Braeunig computes ~180 rem unshielded (mostly electrons/protons in belts; survivable but sickening), then factors spacecraft shielding (~7-8 g/cm² CM hull) to much lower values (consistent with Apollo film-badge/dosimeter data: ~0.2-1+ rad typical). High-energy protons (>100 MeV) pass through with partial deposition.
● Aulis dismisses this broadly via variability/trajectory complaints but doesn't refute the math (flux integration → energy fluence → dose with quality factors). Real Apollo doses were low; no acute effects.
Overall Assessment
The Aulis piece promotes a conspiracy-adjacent view (Apollo didn't go through the belts) by:
● Misrepresenting Braeunig (he doesn't claim zero risk or perfect avoidance, just manageable via trajectory + speed + shielding).
● Conflating short intense exposure with long-term/cumulative/deep-space issues.
● Ignoring quantitative work in favor of diagrams, quotes, and modern probe surprises (which don't retroactively make 1969 data invalid for the actual paths flown).
● Selective NASA document interpretation (e.g., latitudes, "parking orbits").
Braeunig's work has limitations which nobody has ever disputed (model averages, assumptions on shielding/deposition), but it is transparent, physics-based, and aligns with independent evidence (dosimetry, Soviet data, no mass radiation casualties). Broader radiation challenges for future missions (GCR, solar events, long duration) are real and harder—but that's not a debunking of Apollo.Smithsonianmag Whilst the AULIS article raises legitimate questions on data transparency/variability(albeit as some bullshit hoax claim) it completely fails to disprove feasible short transits.
