The direction of the Earth's axis in space, shown in orange, changes over time with respect to extremely distant objects, such as quasars. Nutation and Precession: Nutation and precession are the periodic and long-term motion of the Earth's spin axis in space. VLBI_procession_nutation_Image_thm.png (80x40) VLBI_procession_nutation_Image_web.png (320x179) VLBI_procession_nutation_Image_searchweb.png (320x180)
VLBI_procession_nutation_Image_print.jpg (1024x573)
VLBI_procession_nutation_Image.png (1024x573)
