Webb’s NIRCam and MIRI cameras filled a 2.5-by-1.8-arcminute frame with the inner parsec of the Milky Way, a packed star field 26,000 light-years away in Sagittarius. IRS 3 sits in that crowd, a cool, luminous asymptotic giant branch star only 0.55 light-years from Sagittarius A*, the four-million-solar-mass black hole at the center of the galaxy. […]