More than three decades after launching, NASA's workhorse spacecraft is inching closer to leaving the solar system behind.
Currently 11 billion miles away from the sun, Voyager 1 has been exploring the fringes of the solar system since 2004. Scientists said Monday the spacecraft has entered a new region in the solar system that they have dubbed the "stagnation zone."
Voyager 1 still has a little way to go before it completely exits the solar system and becomes the first manmade probe to cross into interstellar space, or the vast space between stars.
The spacecraft has enough battery power to last until 2020, but scientists think it will reach interstellar space before that - in a matter of several months to years.
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