NASA plans to send a probe where no probe has been before, flying to the edge of the heliosphere by the early 2030s to understand how the solar system formed. The heliosphere is the bubble of space surrounding the sun and enclosing all the planets, from Mercury to Neptune and is affected by solar winds. So far Voyager 1 and Voyager 2, launched in 1977, are the only probes to venture outside the heliosphere, currently 14 and 11 million miles from Earth respectively. The Voyagers discovered the edge of the bubble but left scientists with many questions about how our star interacts with the local interstellar medium.