Thirty years after launch but earlier than expected, Voyager 2 has left the cozy realm of our solar system, where the stream of particles from the sun dominates space.
You might think that space billions of miles from the sun is a placid, empty domain. In fact, Voyager 2 has been heading outward in the same direction as the solar wind, charged particles streaming from the sun, but things started to get a lot more complicated on August 30, when the spacecraft was 7.8 billion miles from the sun.
Voyager 2 finds our solar system is squashed
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