http://en.wikipedia.org/wiki/Orders_of_magnitude_(speed) orders of magnitude (speed) “orders of magnitudes of speed” orders of magnitude (speed) this page 73,800ms-1 isn't that fast Wikipedia 速度 which is only about 1000x faster than hair grows. English 100,000 km/s 150,000 km/s orders of magnitude (speed) en.wikipedia.org - Orders of magnitude (speed). orders of magnitude (speed) Wikipedia 73,800ms-1 http://en.wikipedia.org/wiki/Orders_of_magnitude_(... 16,9 m/s English 100,000 km/s