Rank 7 documents Skylab — the 77,088 kg Apollo Applications workshop launched 14 May 1973 atop Saturn V SA-513, converting leftover lunar hardware into the first US space station. Micrometeoroid shield loss during ascent forced the SL-2 crew to deploy an emergency parasol and later conduct the first US repair spacewalk to free a jammed solar array. Three crew expeditions occupied Skylab for 171 total days in 1973–74, using the Apollo Telescope Mount for solar physics and the workshop volume for human factors experiments from zero-G showers to Earth resources photography. Marshall and JSC teams turned an improvised station into a laboratory that reentered in 1979 after six years in orbit. Heritage Collector renders the cutaway workshop hero, vertical title spine, and ATM solar cluster exactly as the master PNG dictates.