Happy Autumnal equinox 2025! Fall begins in the northern hemisphere todayBy otako_fzbgs4 / September 22, 2025 Astronomical fall begins on Sept. 22 as the sun moves southward across the celestial equator. Related posts: Catch solar bursts in new citizen science project Sped-up simulation of Hera’s Mars flyby Hera asteroid mission’s Mars flyby Watch live: Images from Hera’s Mars flyby
