Kilometers per second (km/s)
Kilometers per second (km/s) is a unit of speed that measures the number of kilometers traveled in one second. It is occasionally used in astronomy and astrophysics where large distances are involved.
Centimeters per second (cm/s)
Centimeters per second (cm/s) is a unit of speed. One meter is equivalent to 100 centimeters and this unit is the number of centimeters travelled in one second.