Sentences with phrase «axis of rotation varies»
Not exact matches
«A Moon-less Earth with the same mass, rotation rate, and orbit as today would have the direction of its spin axis vary chaotically between 0 and 90 degrees on time scales as short as 10 million years,» says Darren Williams, Assistant Professor of Physics and Astronomy at Penn State University and NAI member.
https://www.astrobio.net/
The length of a day (one complete rotation of the earth on its axis and relative to the Sun [a rotation relative to the stars is about four minutes quicker]-RRB- varies, so is not well suited as a unit of time.