Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Habitable Zones, Space Weather & Heliophysics, Status Report, TRAPPIST-1 Hubble’s Multi-Year Search for Exospheres in the TRAPPIST-1 System Reveals Frequent Microflares by Keith CowingJune 17, 2025June 17, 2025 Ly-α observations provide a powerful probe of stellar activity and atmospheric escape in exoplanetary systems.