An ethernet speed of 1 Gbps is equal to one bit time (1 nanosecond (ns)).
At 10 Mbps, bit time is 100. It is 10 at 100 Mbps, and .1 at 10 Gbps.
That means that on a 10 Gbps network, a bit could travel 21,183.3 miles in one second.
(None of this applies if I did the math wrong...)