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Astro Bob

Voyager 2 On Verge Of Interstellar Space

12 Oct 2018, 16:12 UTC
Voyager 2 On Verge Of Interstellar Space
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This graphic shows the position of the Voyager 1 and Voyager 2 probes, relative to the heliosphere, a protective bubble created by the sun that extends well past the orbit of Pluto. Voyager 1 crossed the heliopause, or the edge of the heliosphere, in 2012. Voyager 2 is still in the heliosheath, or the outermost part of the heliosphere. NASA/JPL-Caltech
I’m happy many of my friends from the 1970s are still around. I feel the same way about the dual space probes Voyagers 1 and 2, launched by NASA in 1977 and still kicking to this day. Both went on to explore Jupiter and Saturn with Voyager 2 continuing to Uranus and Neptune. On August 25, 2012 Voyager 1 became the first spacecraft to cross the heliopause, the boundary where the pressure of the solar wind is in balance with the winds blowing from the stars. The heliopause is considered the transition zone between solar and interstellar space. Now, Voyager 2 appears poised to enter interstellar space too.
This illustration shows the paths of the Voyager 1 and 2 spacecraft on their journey through the outer solar system and into interstellar space. Each is traveling in a different direction with ...

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