Overview
- Astronomers report a concentric wave at least 32,000 light‑years across that lifts and lowers stars by roughly 500 to 650 light‑years.
- Stars and gas exhibit linked vertical and radial motion—up‑and‑out at crests and down‑in at troughs—contradicting assumptions that these components are decoupled in galactic disks.
- The team led by Eloisa Poggio identified the structure using Gaia data on about 17,000 young giant stars and some 3,400 Cepheid variables, with results published in Astronomy & Astrophysics (2025).
- The feature is far larger and farther from the Sun than the Radcliffe Wave, with the nearest section beyond 6,500 light‑years and a footprint that could span more than half the galactic disk.
- Researchers have not pinned down a cause, citing possibilities such as a past dwarf‑galaxy encounter or dark‑matter perturbations, and expect Gaia’s next data release in 2026 to sharpen tests of these scenarios.