Live maneuver detection across 28,000+ objects. Orbit changes, proximity alerts and military satellite maneuvers — updated every TLE refresh.

The formation of Mercury remains an unsolved mystery. The planet closest to the sun has a disproportionately large metallic core—accounting for about 70% of its mass—and a relatively small rocky mantle. Until now, the most widely accepted explanation was that Mercury lost much of its crust and mantle after colliding catastrophically with a large celestial body. However, dynamic simulations show that this type of impact involving bodies of very different masses is extremely rare.

A five-dimensional model has successfully predicted the asymmetric fission of mercury isotopes, offering new insights into nuclear fission processes beyond the well-studied elements uranium and plutonium....