What does mean when scientists say the earth wobbles?

1 Answer
Apr 11, 2016


It wobbles like a child's top does but on a longer time scale.


Every 27,000 years the Earth does a kind of wobble, called precession, much like a child's top or a gyroscope. This means that the amount of solar radiation that reaches the northern hemisphere in particular, varies. This wobble is one of three factors related to glacial/interglacial cycles on Earth.

http://www.epm.ethz.ch/research/experimental/experimental-precession.html.html image source here