Earth Blue White — 2 museum-grade prints in this palette. Skylab launched 14 May 1973 as the first US space station, occupying a converted S-IVB stage with an Apollo Telescope Mount for solar observations. The SL-2 crew's emergency repairs after launch damage became a template for on-orbit maintenance that later servicing missions would refine. Apollo 11 landed humans on the Moon on 20 July 1969 UTC, with Neil Armstrong's first step broadcast to a global television audience. The mission returned 21.