The Voyager 1 spacecraft, launched in 1977, is now traveling through interstellar space. But, oddly enough, is still in our solar system. Voyager 1 has left the heliosphere. This means that it has left the sun’s protective bubble, and is now moving through the thicker interstellar plasma. While far away from the orbits of the planets (and Pluto), it hasn’t reached the hypothetical Oort cloud, which would be the actual end of the solar system.