Voyagers ride 'magnetic bubbles'

Humankind's most distant emissaries are flying through a turbulent sea of magnetism as they seek to break free of our Solar System. Nasa's Voyager probes, which were launched in 1977, are now approaching the very edge of our Sun's influence, more than 14 billion km from Earth; and they are still returning data. That information has allowed scientists to build a better picture of what conditions are like in the zone where matter blown out from our star pushes up against interstellar space.

2011-06-09

 Voyager probe interstellar travel heliopause magnet cosmic ray

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