>>16705762 (OP)NASA's Voyager spacecraft did encounter a region of extremely high temperature, described as a "wall of fire," at the edge of our solar system, specifically at the heliopause. This region shows temperatures between 30,000 and 50,000 Kelvin (54,000 to 90,000 degrees Fahrenheit).
Despite the high temperatures, the density of
particles in this region is very low, so the spacecrafts did not experience significant heating as they passed through it.
This is the boundary where the solar wind, a stream of charged particles from the sun, meets the interstellar medium, the gas and dust between stars.
The collision of these winds creates a region of extremely high temperature, reaching 30,000 to 50,000 Kelvin.
While the temperature is very high, the density of particles in this region is very low. This means there are relatively few particles to collide with the spacecraft, preventing significant heating.
There, straight from NASA. Nothing to worry about.