A Hint from the Stellar Halo
Astronomers have observed a slowly rotating stellar halo surrounding the Milky Way, which serves as an important clue to a previously unknown event in our galaxy’s history.
The halo’s unusually slow rotation suggests that the Milky Way’s spiral disk underwent a significant reorientation in the past.
According to the analysis, the disk may have tilted by more than 90 degrees, implying a substantial restructuring of the galactic framework.
Because the exact cause and timing of this tilt remain unclear, researchers view it as an intriguing puzzle that will require further observations and modeling to solve.