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Loading contentAn active galactic nucleus whose relativistic jet points almost directly at Earth.
A blazar is an active galaxy in which a jet of near-light-speed particles from the central black hole is aimed nearly at us, producing extreme, rapidly varying brightness across the spectrum — and, in some cases, high-energy neutrinos.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.