Decades: 1340s 1350s 1360s 1370s 1380s - 1390s - 1400s 1410s 1420s 1430s 1440s
Years: 1389 1390 1391 1392 1393 - 1394 - 1395 1396 1397 1398 1399
Births
Deaths
... precessing around. (The precessing motion is perpendicular to the torque trying to make the gyro fall over.) The axis of the gyroscope in the Dynabee is fixed to the ...