Metric system | United States Metric Board | metric system | Alex Metric | U.S. Metric Association | The Metric Marvels | Performance metric | Metric signature | Metric expansion of space | metric expansion of space | Kerr metric | Kantowski-Sachs metric | Gödel metric | Friedmann–Lemaître–Robertson–Walker metric | Fisher information metric |
Alcubierre metric (which has been used as a speculative toy model of effectively superluminal space travel, as in the warp drive from Star Trek).