NASA's Voyager Spacecraft Found A 30,000-50,000 Kelvin "Wall" At The Edge Of Our Solar System

In 1977, NASA launched the Voyager probes to explore the outer reaches of the Solar System and the interstellar space beyond. Eventually, both spacecraft encountered a blazing “wall of fire” at the system’s boundary, recording temperatures between 30,000 and 50,000 kelvin (about 54,000 to 90,000 degrees Fahrenheit) as they passed through. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

There are a few ways you could define the edge of the Solar System – for instance, where the planets end, or at the Oort cloud, the boundary of the Sun's gravitational influence, where objects may still return closer to the Sun. One way is to define it as the edge of the Sun's magnetic field, where it pushes up against the interstellar medium, known a