Seems like something wrong with our solar system. I just read an article from Scientificblogging and it really shows that our solar system is not like what we are thinking before.

NASA’s Voyager 2 spacecraft has entered a vast region at the edge of our solar system where the solar wind runs up against the thin gas between the stars, called the heliosheath, and what it found is surprising - our solar system is ‘dented.’

Voyager 2 entered the heliosheath on August 30, 2007, crossing the heliosheath boundary, called the solar wind termination shock, about 10 billion miles away from Voyager 1 and almost a billion miles closer to the sun, and confirmed that our solar system is “squashed” – that the bubble carved into interstellar space by the solar wind is not perfectly round. Where Voyager 2 made its crossing, the bubble is pushed in closer to the sun by the local interstellar magnetic field.

I also believe that the scientists, astronomies and Voyager 2 will keep continue to track this heliosheath boundary because the world will always waiting for the latest news about this.

Take a look at this picture (courtesy from scientificblogging.com):

What do you think?