Voyager 1 has been traveling for about a year through plasma between stars
No kidding, That's about the 6th time I've read about it these last two years. WHY doesn't NASA begin by establishing WHAT is it exactly that makes a solar system official "boundary" before producing press releases every time they find something interesting in the readings sent to them by Voyager.ADDENDUM : Ahem, Thanks for the downvotes, but the inner workings of space discovery are not the subject of my comment. As an engineer, I'm more than mindful of the back & forth & general messiness of discovery, peer-reviews, control groups, & the like. I'm talking about press releases & headlines targeted towards the GENERAL PUBLIC. A public that has a lot less of an appetite, patience or time to follow NASA's inner deliberations or the intricacies of the scientific method. The fact that this is the 5th or sixth time that they've heard that "Voyager has left the solar system" might leave them a little bit confused.