Voyager Enters Final Frontier Of Solar System |
Voyager Enters Final Frontier Of Solar System |
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Jun 3 2005, 10:47 PM
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http://planetary.org/news/2005/voyager-upd...ation_0524.html
Voyager 1, the most distant human-made object in space, has crossed the termination shock, the last major threshold in the solar system, team members announced today at the annual American Geophysical Union (AGU) meeting in New Orleans, Louisiana. |
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Sep 2 2017, 02:52 PM
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Junior Member Group: Members Posts: 27 Joined: 26-August 13 Member No.: 6994 |
For what it's worth, a paper just came out ("Time-varying Heliospheric Distance to the Heliopause", Washimi, Tanaka, and Zank, Astrophysical Journal Letters 846, L9, 2017 Sep 1) that predicts Voyager 2 should reach the heliopause any day now--you know, give or take a year. They use a model that includes the effects of global merged interaction regions, injecting one of typical size once per year, as well as the varying solar wind ram pressure, which varies over the solar cycle and which they model with a couple step functions. They don't compare with previous work so I'm not sure why this hasn't been done before or what the differences are, although they say that adding the GMIRs pushes out the heliopause by about 14 AU compared to a static model. They tuned their results by 4% to match the Voyager 1 heliopause encounter, but even so there's a fair amount of uncertainty because the model predicts that the heliopause will be moving outward for the next few years just as V2 is getting really close. V2 is moving faster, so it's steadily closing the gap, but from my reading there may be even more of the out?/in?/out shenanigans than V1 saw.
Edit: Voyager particle data here. |
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