This animation is a visualization of actual data from Voyager 1 during August 2012.


The meter depicts the dramatic changes in readings by Voyager’s cosmic ray instrument on Aug.25, 2012. The instrument detected a dip in the levels of charged particles that originate from inside our heliosphere, and rise in the levels of cosmic rays – charged particles that originate from stars other than our sun.

These data had suggested that Voyager entered intersteller space, and definitive evidence came later from a different instrument.
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