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K Labs preserves NASA-era digital engineering material on FPGAs, ASICs, radiation effects, fault tolerance, processor verification, failure reports, Apollo computing, MAPLD proceedings, and practical lessons from electronics built for space flight.
Astronomy Picture of the Day has been edited by Robert Nemiroff and Jerry Bonnell since 1995, building a daily archive of annotated astronomy images alongside a hand-built subject index covering stars, galaxies, nebulae, planets, observatories, spacecraft, scientists, and astronauts.
NASA Goddard's StarChild site has taught astronomy to children since 1996 using two reading levels, activities, glossaries, graphics, and the wonderfully direct structure of an early educational website.
NOVA's 1999 To the Moon companion site preserves Apollo interviews, lunar science, puzzles, transcripts, and six QuickTime VR panoramas from the successful moon landings.
Astronautix preserves the long, expensive, repeatedly redesigned history of Space Station Freedom, the American station program whose hardware and planning were folded into the International Space Station.
Apollo programmer Don Eyles's long technical paper explains the Lunar Module guidance computer from the inside, including the 1201/1202 alarms, software restarts, throttle instability, and the tiny memory budget that still landed astronauts on the Moon.
NASA's Astronomy Picture of the Day archive began in June 1995 and still exposes decades of astronomy outreach as a giant chronological list of ordinary web links.
NASA still hosts pages from POLAR, a late-1990s and early-2000s experiment that searched for large-scale polarization in the cosmic microwave background with a ground-based microwave radiometer.