Model globe with free precession movement

摘要

Model globe motion free precession, which facilitates understanding of the precession of the Earth, for which comprises: # - a globe (4) comprising two poles and can rotate freely about a polar axis (5 ) passing through said poles, # - a vertical shaft (3) which is attached to the polar axis (5), # where said vertical axis (3) can freely rotate with respect to a base (1) and the polar axis (5) It has an inclined against the vertical axis (3) arrangement.