Understanding Earth's Rotation: The Effects on Telescope Observations

[crx]

i have a little telescope of 70mm in diameter and 600mm focal length, its just good too see ...birds, but when i use the 9mm eyepiece and zoom to a star , the star's image will quickly pass to the vision field because of the rotation of the Earth. What i observed could be just an, optical illusion but it seems that the movement of the star in the image its not constant but its jerking, its like a non uniform motion , ...have any idea?

 

[mgb_phys]

It's pretty uniform!
The jerky motion is either due to movement of the telescope shaking in the wind, or at high magnification the atmospheric turbulence or 'seeing'