Science ❯ Astrophysics ❯ Observational Astronomy

Cherenkov Telescopes

High-Energy Astrophysics LST-1 Observations

Record-Setting Day-Long GRB 250702B Confirmed at z = 1.036 as Origin Remains Unsettled

JWST pins the distance at z = 1.036, leaving an extreme energy budget that no single progenitor model yet accounts for.