This talk presents breakthroughs in the study of exoplanetary systems and highlights key targets in our search for habitable worlds. We will show how the James Webb Space Telescope (JWST) revealed its capabilities for planetary defense and discuss plans to use JWST in March 2026 to refine the probability of a 2032 lunar impact for asteroid 2024 YR4—which would disrupt Earth’s satellite infrastructure. This work is challenging our views and seemingly shepherding us towards planetary stewardship.