%0 Journal Article
%T Remarks about External Forces Acting on Earth¡¯s Rotation Axis
%A Monica Zoe Ciobanu
%J World Journal of Mechanics
%P 73-77
%@ 2160-0503
%D 2023
%I Scientific Research Publishing
%R 10.4236/wjm.2023.132003
%X It is well known that a
variation in </span><span><span style=\"font-family:&quot;\">the </span></span><span><span style=\"font-family:&quot;\">direction of Earth¡¯s
rotation axis is a real astronomical phenomenon</span></span><span><span style=\"font-family:&quot;\">,</span></span><span><span style=\"font-family:&quot;\"> named nutation</span></span><span><span style=\"font-family:&quot;\">.</span></span><span><span style=\"font-family:&quot;\"> It is interesting if a
variation of this axis can take place only in intensity, in the simplest
theoretical case of only two rigid body dynamic</span></span><span><span style=\"font-family:&quot;\">s</span></span><span><span style=\"font-family:&quot;\">. This paper presents two
positions of the Moon during its monthly orbit, where a sudden variation of
Earth</span></span><span><span style=\"font-family:&quot;\">¡¯</span></span><span><span style=\"font-family:&quot;\">s rotation axis in intensity
can take place. The duration of this phenomenon is limited in time</span></span><span><span style=\"font-family:&quot;\">,</span></span><span><span style=\"font-family:&quot;\"> maybe an instant or a day,
and then a vortex can appear.
%K Nutation
%K Variation in Intensity of Earth¡¯s Rotation Axis
%K Chandler¡¯s Wobble
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=123799