Number of particles from the Sun hitting Voyager 1. Credit: NASA

Voyager 1
May Have Left the Solar System

by NANCY ATKINSON on OCTOBER 8, 2012

While there’s no official word from NASA on this, the buzz around the blogosphere is that Voyager 1 has left the Solar System. The evidence comes from this graph, above, which shows the number of particles, mainly protons, from the Sun hitting Voyager 1 across time. A huge drop at the end of August hints that Voyager 1 may now be in interstellar space. The last we heard from the Voyager team was early August, and they indicated that on July 28, the level of lower-energy particles originating from inside our Solar System dropped by half. However, in three days, the levels had recovered to near their previous levels. But then the bottom dropped out at the end of August.

Read more: Voyager 1 May Have Left the Solar System — Universe Today.

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