The Fastest Star in the Milky Way Will Test Relativity
Astronomers have discovered another S star, the population of stars that orbits the Milky Way's SMBH. This one is the fastest of them all, and also comes closest to the SMBH. It will let astronomers test relativity, especially the Lense-Thirring effect.
We haven't written up this one. Universe Today has the full story — the link below goes straight to it.