# The Earth revolves around with a speed of approximately 1,600 km/h. How far above the earth do you start noticing this rotation?

Fortunately, you don’t have to take off.You notice it quite quickly when you are on the ground: the whole firmament, including sun and Moon, seems to be constantly rotating around us in twenty-four hours. Especially at sunrise and sunset, the effects of Earth rotation are very clear and often spectacularly visible.

From an airplane

From a traffic plane it is also good to note that the Earth revolves around its axis.When you fly from east to west — against the rotation of the Earth — you can almost freeze the course of day to night, ascend just before sunset, travel the sun, and slowly see him for hours. With a Concorde or a supersonic military plane, you can even ‘ catch up ‘ the sun and see it rise in the West: departure just after sunset from London and land a few hours later before sunset in New York. Unfortunately, you can’t book a flight on the Concorde nowadays.

Space

Space travel can benefit from the rotation of the earth.In order to get a vessel in a low orbit to the Earth, we have to accelerate it to a now of almost 30,000 kilometers per hour. When we launch a rocket near the equator on the right side (to the east, with the rotation of the earth with it), we get almost 1,700 kilometers per hour at nature rotationsspeed Gift. This significantly saves the amount of fuel needed. For this reason we preferably launch near the equator, towards the east, where the push in the back of the Earth rotation is maximum.

Geostationary satellites

What we do in space is also satellites in a very spacious, high orbit (ca.36,000 kilometers) above the equator. To a height where the duration of one rotation of the earth around its axis is exactly the same as the circulation duration of the satellite. We call this a ‘ geostationary orbit ‘ because a satellite in such a orbit seems to be still hanging over one and the same point above the equator. The satellite rotates exactly as it were with the Earth. And with this you have found the opposite of what you were looking for: you have finally gone high enough to stop noticing the Earth’s rotation. If you look straight down from the satellite, you always see the same point.

That is what you mean by ‘ noticing ‘.As Jules syrup indicates, we see most days (unless it is very cloudy) the effects of the rotation on the earth as we look at the sky.And of course it becomes light every day and dark again.

But if you mean, when your body notices that, then the answer is: Never.Indeed, your body cannot perceive (with a sense) speed. We can only observe acceleration/delay, or (change in) rotation.

Equilibrium organ-Wikipedia

There are all sorts of ways in which we can indirectly perceive speed/rotation, for example visually because things are moving around you, or because you feel you are moving through ‘ stationary ‘ air (on the bike), or by pushing back the seat when you are in a Running Fairground attraction.But speed itself is not.

Therefore, you can also sit very quietly and comfortably in a plane that flies at high speed.The ‘ speed ‘ that you experience is the slight changes in altitude that the plane makes by airborne irregularities, and vibrations from the aircraft.

And it may also explain why one thought very early (apart from egocentrism) that the sun turned around the earth.For the Earth, with us on it, stood still?

And finally, gravity varies by that rotation, actually: it is less large at the equator:

Gravitation-Wikipedia

That’s on the crowd you’re out of that plus a space suite.Also, you can notice it in more than 1 way, eg (I’m not smart enough to make the calculation) but you’re going to see difference in time of speed light minus 1600 km/h will keep you a little younger than if you had stayed at home Oo Terra Ferma. And no mean no time zone.