merry go round?

Question

i am confused.

for many years , science taught me that earth rotate around the sun and stuff.

how do i know we are not in a merry go around situation ? a kid inside the merry go around will think everyone around her is spinning .. while people outside the mgr will think that she is the only 1 spinning.

would it make any difference if the universe is rotating around us , or like the solar system is rotating and other stars are also rotating while earth is fixed ? ?

Answer 1

There are numerous ways to detect that the Earth is rotating. Foucault pendulum was one of the earliest that closed the issue. Gyrocompasses, inertial reference systems, etc all use the fact that the earth is rotating to determine directions and position on earth.

The fact that a Coriolus force can be detected and measured also indicates that the Earth rotates.

Answer 2

You are either a very young person or you have had little education.

When you have learned the most basic physics, you will understand that it is impossible for something the size of the sun, the solar system, the stars, the universe to be rotating around us daily.

Everything orbits something. Why would Earth be different?

The only thing that confused the whole issue before the likes of Copernicus sorted it out, was that religion dictated that the Earth was central to everything. That made the paths of the planets and the daily rotation of everything totally unfathomable.

Soon as people dropped that nonsense, and accepted the orbit of the Earth around the sun, and its diurnal spin, the whole thing became as clear as clockwork.

The laws of physics are seen to work everywhere. The planetary motions are amazingly simple and can be seen by the most amateur astronomers.

I think you need a lot of education. You seem to be locked in the Medieval times.

Answer 3

the difference is the same for the kid on the MGR.

the kid on the MGR can observe that the world is going
around him. but that would wrong, and physics would easily prove it to be. for example the sun that he sees traveling around him every 20 seconds or so would have to be traveling at several times the speed of light. to keep showing up every 20 seconds. not possible.

the observer of the MGR will not have this issue. His perspective will show the motion of the MGR and the sun "motion" will not have to break any laws of physics.

this is the same situation for our perspective from the great big MGR called earth

Answer 4

If the earth were fixed 'Foucaults Pendulum` wouldn't behave as it does. - Wiki it.
In principle, rotation is one of the few things in your
relation to local space / time that you can absolutely
detect without outside reference.