One of the earliest measurements was made by observing the orbits of the moons of Jupiter.
people traveled by wooden boats. Some boats were good in shallow water but others were not and some were light and fast but others were slow and heavy.
Because if you are driving somewhere from a long distance,it is not helping you at all. Thankyou, Come Back Again!
The farthest light has traveled is 13.8 billion light years from Earth, which is the observable edge of the observable universe.
It is known as a light year.
8km/h
If you traveled at the speed of light (a current impossibility), you would travel from Earth to the Sun in an average of 8 minutes. Or would you? I suspect that you would burn up well before the 8 minutes were up.
Yankee traders were known for their fast clipper ships.
It is known as a light year.
I think you can figure it out yourself
It's Nova ;)
X-43 traveled at the speed of Mach 9.6.
800kph