So Voyager 1 has left the solar system. Or has it?

It seems nobody knows for sure. But then again it is 11.5 billion miles away so NASA may be having problems getting the signals and they may be confused.

NASA isn't alone in having signal problems, I can't get a phone signal inside my home on mainland Britain and sometimes not even outside my front door!

But to return to Voyager; I am somewhat confused about where exactly it is supposed to be. The reason for all the brou haha in the media is that Voyager may have left the solar system and ventured into interstellar space. Now, interstellar space is officially 'the space between the stars' But surely the stars are all around us here on Earth. So are we not always and unavoidably in 'the space between the stars' every day? I must have misread something in my quantum theory text books.