Astronomers already knew the Milky Way’s magnetic field reverses near the Sagittarius Arm, but a new 2026 three-dimensional model revealed the boundary’s unexpected shape: not a vertical wall between spiral arms, but a tilted magnetic plane slicing diagonally through the Galactic disc and passing just above our own region of space.
The Milky Way has a magnetic field, but no camera can step outside the Galaxy and photograph its…