(November 6, 2025)

According to NASA, Voyager 1 has now encountered what researchers describe as a “wall of fire,” a zone where temperatures reach between 30,000 and 50,000 kelvin — roughly 30,000 degrees Celsius. The finding was made as part of ongoing efforts to understand the boundary separating our Solar System from interstellar space.

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“An observation made by Voyager 2 confirms a surprising result from Voyager 1: the magnetic field in the region just beyond the heliopause is parallel to the magnetic field inside the heliosphere,” NASA noted. With data from both spacecraft, scientists can now confirm that this alignment is not a coincidence but a defining characteristic of the boundary region.