NASA’s Voyager spacecraft have found an extremely hot region at the edge of our solar system that scientists call a “wall of fire.” This discovery changes what we knew about where our solar system ends and deep space begins. Launched in 1977, the Voyager 1 and 2 spacecraft were sent to study planets like Jupiter and Saturn. After finishing this job, they kept traveling outward toward the edge of our solar system. When the Voyagers reached the boundary called the heliopause – where the Sun’s influence ends and interstellar space begins – they measured temperatures between 30,000 to 50,000 Kelvin … Continue reading NASA’s Voyagers Navigate 90,000°F “Wall of Fire” at Solar System’s Edge While Solving Cosmic Mystery