| A solar wind of plasma particles constantly streams outward from the Sun until, at the outermost limit of the Solar System, it reaches the heliopause. |
| In a small side article, she notes that NASA's Voyager 2 spacecraft has passed the heliopause, the outermost edge of our solar system. |
| Electromagnetic propulsion could take us to the heliopause at a speed unachievable by conventional spacecraft. |
| That includes two Voyager probes looking for the heliopause, where true interstellar space begins. |
| The fact that a man-made object is now approaching the heliopause, where the solar winds cease to blow, is a remarkable achievement. |
| Its last assignment was to find the heliopause, where the solar wind is offset by the galactic wind, but in April 1997 it was passed by a younger, faster Voyager spacecraft. |
