In August 2012, NASA’s Voyager 1 spacecraft became the first human-made machine to venture beyond the boundary of our solar system—into interstellar space. Both Voyager 1, and its partner, Voyager 2, ...

Earth and the planets in the solar system sit within the heliosphere, a giant bubble formed by the charged particles, like protons, electrons, and alpha particles called the Solar Wind that emanate ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A diagram of our heliosphere. For the first time, scientists ...