It took 35 years but Voyager 1 is about to cross the boundary from our solar system into interstellar space.

New data revealed today in the journal Science suggest that the craft is now more than 11 billion miles from the sun.

It's unclear how much farther the probe still needs to travel before it departs into interstellar space, with estimates ranging from months to years. It has a long trek to go given that the heliosphere is believed to be at least 8 billion miles beyond our solar system, according to NASA.


More. . .