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Loading contentMillisecond flashes of radio waves from far across the universe, immensely energetic for their brevity. At least some come from magnetars; most are one-off, though a few repeat. Their dispersion probes the matter between the galaxies.
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.