Space is nothing, it is the lack of matter, it doesn't have a speed, it doesn't have a temperature, it does have a smell or a taste... it is nothing, it's empty space.
I would call it current speed, not average speed.
The average speed of the Gulf Stream current in the Atlantic Ocean is about 4 miles per hour.
The average orbital speed is 17.882 km/s of asteroid in space
17,500 mph
The average speed of the space shuttle was around 17,500 miles per hour (28,000 kilometers per hour) while in orbit.
A car's speedometer typically shows the instantaneous speed, which represents the current speed of the vehicle at any given moment. It does not show average speed or velocity.
This will depend not only upon the strength of the current (in Amperes), but also on the wire's cross-section. In any case, in a typical current, the electrons have an average speed of a tiny fraction of a milliter per second.
The average speed of a space shuttle in Earth's orbit is approximately 17,500 miles per hour (28,000 kilometers per hour). This speed allows the shuttle to maintain its orbit around the Earth while traveling at a high velocity.
The Gulf Stream current flows at an average speed of about 4 miles per hour.
The average speed of the International Space Station is 17,221 miles per hour. It completes an orbit every 91.48 minutes at an average altitude of 222.3 miles.
Instantaneous speed is the speed of a body at any one instant. There is really no such thing as the instantaneous speed, it is merely the average speed over a very short space of time.
Current jet fighters average about 1,300 mph.