Outbound LEARN-link health — last run

Generated by scripts/check-learn-links.ts (ADR-051 Milestone L-E). Last run: 2026-05-10.

Summary

• Total: 675
• ✅ OK: 606 (89.8%)
• ↪️ Redirect: 0 (0.0%)
• 🔒 Forbidden / login wall: 37
• ⌛ Timeout: 2
• ⚠️ Error: 26
• ❌ Dead: 4

Methodology

• HEAD request; falls back to GET only when the server replies 405. We never download bodies.
• Per-host timeout 8s via AbortController.
• Concurrency cap 8 in-flight requests (polite default).
• User-Agent: Orrery-LinkChecker/1.0 (+https://github.com/chipi/orrery; outbound-link health under ADR-051) — operators can reach us via the linked repo.
• Login walls (401, 403) are reported separately from dead pages — they aren't broken, they're access-controlled.

Issues

Status	Source	Entity	URL	HTTP
❌ dead	blue-origin	blue-moon-mk1	https://www.blueorigin.com/blue-moon	429
❌ dead	ieee	inspiration-mars	https://ieeexplore.ieee.org/document/6497418	418
❌ dead	blue-origin	new-shepard	https://www.blueorigin.com/new-shepard/	429
❌ dead	blue-origin	new-shepard	https://www.blueorigin.com/news/first-human-flight-updates	429
⚠️ error	nasa	apollo-lm	https://www.hq.nasa.gov/alsj/LM_News_Reference.pdf	—
⚠️ error	wikipedia	atlas-v	https://en.wikipedia.org/wiki/Atlas_V	—
⚠️ error	wikipedia	buran	https://en.wikipedia.org/wiki/Buran-class_orbiter	—
⚠️ error	wikipedia	cassini	https://en.wikipedia.org/wiki/Cassini–Huygens	—
⚠️ error	wikipedia	chandrayaan3	https://hi.wikipedia.org/wiki/चन्द्रयान-3	—
⚠️ error	wikipedia	change-2	https://en.wikipedia.org/wiki/Chang'e_2	—
⚠️ error	wikipedia	change-5	https://en.wikipedia.org/wiki/Chang'e_5	—
⚠️ error	wikipedia	falcon-heavy	https://en.wikipedia.org/wiki/Falcon_Heavy	—
⚠️ error	roscosmos	glonass	https://www.glonass-iac.ru/	—
⚠️ error	wikipedia	hitomi	https://en.wikipedia.org/wiki/Hitomi_(satellite)	—
⚠️ error	ipgp	insight	https://www.seis-insight.eu/en/public-2/martian-science/marsquake-service	—
⚠️ error	nasa	luna-9	https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-006A	—
⚠️ error	wikipedia	luna10	https://en.wikipedia.org/wiki/Luna_10	—
⚠️ error	wikipedia	makemake	https://en.wikipedia.org/wiki/Makemake	—
⚠️ error	nasa	mariner-4	https://www.nasa.gov/wp-content/uploads/2023/03/sp-4212.pdf	—
⚠️ error	wikipedia	mars2	https://en.wikipedia.org/wiki/Mars_2	—
⚠️ error	wikipedia	opportunity	https://en.wikipedia.org/wiki/Opportunity_(rover)	—
⚠️ error	nasa	phobos-2	https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1988-059A	—
⚠️ error	wikipedia	pslv-xl	https://en.wikipedia.org/wiki/Polar_Satellite_Launch_Vehicle	—
⚠️ error	nasa	saturn-v	https://history.nasa.gov/SP-4029/SP-4029.htm	—
⚠️ error	nasa	space-shuttle-orbiter	https://www.nasa.gov/space-shuttle/	—
⚠️ error	wikipedia	tess	https://en.wikipedia.org/wiki/Transiting_Exoplanet_Survey_Satellite	—
⚠️ error	wikipedia	tianwen1	https://en.wikipedia.org/wiki/Tianwen-1	—
⚠️ error	wikipedia	tianwen1-orbiter	https://en.wikipedia.org/wiki/Tianwen-1	—
⚠️ error	nature	zhurong	https://www.nature.com/articles/d41586-021-01357-5	—
⚠️ error	nasa	zvezda	https://www.nasa.gov/international-space-station/	—
🔒 forbidden	science-aaas	artemis3	https://www.science.org/doi/10.1126/science.aap8637	403
🔒 forbidden	roscosmos	buran	https://www.roscosmos.ru/30025/	403
🔒 forbidden	science-aaas	chandrayaan1	https://www.science.org/doi/10.1126/science.1178658	403
🔒 forbidden	roscosmos	energia	https://www.roscosmos.ru/30025/	403
🔒 forbidden	roscosmos	luna-16	https://www.roscosmos.ru/24187/	403
🔒 forbidden	roscosmos	lunokhod-2	https://www.roscosmos.ru/24187/	403
🔒 forbidden	science-aaas	mars	https://www.science.org/doi/10.1126/science.aar3201	403
🔒 forbidden	roscosmos	mars-2	https://www.roscosmos.ru/24186/	403
🔒 forbidden	roscosmos	mars-3	https://www.roscosmos.ru/24186/	403
🔒 forbidden	nasa	mars-polar-lander	https://mars.nasa.gov/mars-exploration/missions/mars-polar-lander/	403
🔒 forbidden	elsevier	mmx	https://www.sciencedirect.com/science/article/abs/pii/S0094576518316758	403
🔒 forbidden	nasa	neptune	https://voyager.jpl.nasa.gov/mission/science/planet-neptune/	403
🔒 forbidden	elsevier	neptune	https://www.sciencedirect.com/science/article/abs/pii/S0019103521000981	403
🔒 forbidden	roscosmos	phobos-2	https://www.roscosmos.ru/24190/	403
🔒 forbidden	roscosmos	progress-7k-tg	https://www.roscosmos.ru/24171/	403
🔒 forbidden	roscosmos	progress-m	https://www.roscosmos.ru/24171/	403
🔒 forbidden	roscosmos	progress-ms	https://www.roscosmos.ru/24171/	403
🔒 forbidden	roscosmos	proton-m	https://www.roscosmos.ru/24171/	403
🔒 forbidden	roscosmos	r-7-vostok	https://www.roscosmos.ru/24180/	403
🔒 forbidden	roscosmos	salyut-6	https://www.roscosmos.ru/24178/	403
🔒 forbidden	roscosmos	salyut-7	https://www.roscosmos.ru/24178/	403
🔒 forbidden	science-aaas	saturn	https://www.science.org/doi/10.1126/science.aat2965	403
🔒 forbidden	roscosmos	soyuz_ms	https://www.roscosmos.ru/22364/	403
🔒 forbidden	roscosmos	soyuz-7k-ok	https://www.roscosmos.ru/24180/	403
🔒 forbidden	roscosmos	soyuz-fg	https://www.roscosmos.ru/24180/	403
🔒 forbidden	roscosmos	soyuz-ms	https://www.roscosmos.ru/24181/	403
🔒 forbidden	roscosmos	soyuz-t	https://www.roscosmos.ru/24180/	403
🔒 forbidden	roscosmos	soyuz-tm	https://www.roscosmos.ru/24181/	403
🔒 forbidden	roscosmos	soyuz-tma	https://www.roscosmos.ru/24181/	403
🔒 forbidden	roscosmos	soyuz-u	https://www.roscosmos.ru/24180/	403
🔒 forbidden	roscosmos	spektr-rg	https://www.roscosmos.ru/24209/	403
🔒 forbidden	annual-reviews	sun	https://www.annualreviews.org/doi/10.1146/annurev-astro-052920-094029	403
🔒 forbidden	nasa	uranus	https://voyager.jpl.nasa.gov/mission/science/planet-uranus/	403
🔒 forbidden	roscosmos	venera-7	https://www.roscosmos.ru/24189/	403
🔒 forbidden	roscosmos	voskhod	https://www.roscosmos.ru/24178/	403
🔒 forbidden	nasa	voyager-1	https://voyager.jpl.nasa.gov/mission/status/	403
🔒 forbidden	nasa	voyager-2	https://voyager.jpl.nasa.gov/mission/status/	403
⌛ timeout	cnsa	shenzhou	http://en.cmse.gov.cn/	—
⌛ timeout	cnsa	tianzhou	http://en.cmse.gov.cn/	—