2020s Poster Warmth — 2 museum-grade prints that set the mood. The James Webb Space Telescope represents the largest space observatory ever launched and the most ambitious folding-spacecraft deployment in NASA history. Its infrared vision peers through cosmic dust to observe the first galaxies, exoplanet atmospheres, and stellar nurseries invisible to Hubble's optical range. DART demonstrated that humanity possesses a viable kinetic impactor technique for asteroid threat mitigation — a capability debated in science fiction for decades before APL proved it in September 2022. The 32-minute orbital period change of Dimorphos around Didymos exceeded pre-impact predictions and validated planetary defense as an engineering discipline rather than a theoretical exercise.